Quick Answer
Both những and các are plural markers in Vietnamese, but they carry different meanings. Những refers to an indefinite, partial group — similar to "some" or "several" in English. Các refers to a definite, complete group — closer to "all" or "the" (plural) in English.
A simple rule: use các when you mean every member of a known group, and use những when you mean some or a number of things without implying completeness.
Comparison Table
| Feature | những | các |
|---|---|---|
| Core meaning | some, several, a number of | all, every (of a defined group) |
| Definiteness | Indefinite — partial group | Definite — complete group |
| Formality | Informal to neutral | Neutral to formal |
| Used with numbers | Yes — những ba lần (as many as three times) | No |
| Used to address a group | No | Yes — các bạn (all of you / everyone) |
| Hán-Việt origin | Native Vietnamese word | 各 (each/every) — recognizable to JA/ZH/KO learners |
| Emotional or nostalgic tone | Very common — những kỷ niệm (memories) | Uncommon in emotional contexts |
Detailed Explanation
When to use những
Use những when talking about a group of things or people in a general, indefinite way — not all of them, just some. It conveys the idea of "a number of" or "certain" things without defining the full set.
It appears naturally in emotional and descriptive contexts: memories, dreams, feelings, and personal experiences. The phrase những kỷ niệm đẹp means "beautiful memories" — some treasured moments, not every moment that has ever existed.
Những can also precede a number to add emphasis, expressing surprise at the quantity. Những ba lần means "as many as three times" — the speaker is impressed or surprised by that number.
It also appears in fixed expressions: những gì (whatever, the things that) and những lúc / những khi (sometimes, at times when). These phrases only work with những, never with các.
When to use các
Use các when referring to all members of a clearly defined group. It implies completeness — you are talking about every item or person in that category, not a partial subset.
It is the standard choice in formal speech, official announcements, academic writing, and professional settings. Teachers say các em to address the entire class. Presenters say các bạn to include every person in the audience.
For learners who read Chinese or Japanese, các derives from Hán-Việt 各 (Chinese: gè 各, Japanese: かく 各), meaning "each" or "every." This makes it intuitive: các nước = "all the countries / each country." This Hán-Việt connection makes các especially easy to remember for East Asian learners.
Các cannot be combined with numbers. You cannot say các ba người. For emphatic quantities, use những before the number instead.
Example Pairs
Each pair below shows both words used in a similar context so you can directly compare the difference in meaning.
Tôi có những cuốn sách hay về tiếng Việt.
I have some good books about Vietnamese. (a few specific books, not every book on the topic)
Các cuốn sách trong thư viện đều miễn phí.
All the books in the library are free. (every book in that library)
Những người bạn của tôi rất tốt bụng.
Some friends of mine are very kind. (certain friends, not necessarily all of them)
Các bạn trong lớp đều giỏi tiếng Anh.
All the students in the class are good at English. (every person in the class)
Cô ấy có những ý kiến rất sáng tạo.
She has some very creative ideas. (a number of ideas, not all possible ideas)
Các ý kiến của học sinh đều được ghi lại.
All the students' ideas were recorded. (every single idea was captured)
Tôi nhớ những kỷ niệm đẹp khi còn nhỏ.
I remember the beautiful memories from my childhood. (cherished personal moments)
Các nước Đông Nam Á có ẩm thực rất phong phú.
All Southeast Asian countries have very rich cuisine. (the entire region, every country)
Có những lúc tôi cảm thấy rất mệt.
There are times when I feel very tired. (sometimes, on certain occasions)
Các buổi họp trong tuần đã hoàn thành.
All the meetings this week have been completed. (every scheduled meeting)
Anh ấy mua những trái cây tươi ở chợ.
He bought some fresh fruit at the market. (various fruit, an unspecified selection)
Các loại trái cây ở đây đều rất ngon.
All types of fruit here are very delicious. (every variety available)
Tôi thích những bài hát dân ca Việt Nam.
I like some Vietnamese folk songs. (certain folk songs that I enjoy)
Các em học sinh hãy mở sách ra.
All students, please open your books. (a direct address to the entire class)
Common Patterns
Certain fixed expressions always use one word and never the other. Memorizing these patterns will help you sound natural immediately.
Patterns with những only
những gì — whatever, the things that (e.g., những gì bạn cần — whatever you need)những lúc / những khi — sometimes, at times when (e.g., những lúc buồn — at sad moments)những + number — as many as [number], emphatic surprise (e.g., những ba lần — as many as three times)những + emotional noun — memories, dreams, hopes, regrets (e.g., những giấc mơ — dreams; những nỗi lo — worries; những kỷ niệm — memories)
Patterns with các only
các bạn — all of you, everyone (addressing a peer group)các em — all of you (used by teachers addressing students)các anh / các chị — all of you (addressing older males or females as a group)các nước — all countries (e.g., các nước ASEAN — all ASEAN countries)các loại — all types, various types (e.g., các loại rau — all types of vegetables)trong các trường hợp — in all cases (formal and legal usage)
Common Mistakes
Mistake 1 — Using các when the group is not complete or definite
Beginners often use các when they only mean "some" or "a number of" things — not the entire set. Remember that các implies you are covering every member of a defined group.
❌ Tôi có các ý tưởng hay về chủ đề này.
✅ Tôi có những ý tưởng hay về chủ đề này.
The speaker has some good ideas — not necessarily all conceivable ideas on the topic. This is an indefinite, partial group, so những is correct. Các would wrongly imply the speaker holds every idea that exists.
Mistake 2 — Using những to address a group of people directly
When calling out to or addressing a group, các is always required. Fixed address forms like các bạn, các em, and các anh chị are set expressions that cannot be replaced with những.
❌ Những bạn ơi, chúng ta bắt đầu nhé!
✅ Các bạn ơi, chúng ta bắt đầu nhé!
Using những bạn here sounds unnatural and grammatically incorrect to native speakers. Direct address to a group always uses các — this is one of the clearest and most consistent rules in Vietnamese grammar.
Mistake 3 — Using các with a number
Các cannot be placed before a number. When you want to emphasize a quantity — often with a sense of surprise — use những before the number instead.
❌ Anh ấy đã gọi điện cho tôi các ba lần hôm nay.
✅ Anh ấy đã gọi điện cho tôi những ba lần hôm nay.
Những ba lần means "as many as three times" and signals that the speaker finds this number surprisingly high. Các is simply not grammatical in this position.
Mistake 4 — Using các in emotional or nostalgic sentences
In sentences about memories, feelings, or personal experiences, những is the natural and expected choice. Using các in these contexts sounds stiff, clinical, and unnatural — like reading from an official document.
❌ Tôi nhớ các kỷ niệm hồi nhỏ của mình.
✅ Tôi nhớ những kỷ niệm hồi nhỏ của mình.
Nostalgia, dreams, hopes, and personal feelings always pair with những. If you use các, the sentence sounds like a formal inventory rather than a heartfelt recollection.
Mistake 5 — Using những in formal announcements
In official or institutional language — school announcements, policy statements, formal speeches — các is required. Using những in these contexts sounds too casual and implies only some people are being addressed, not all.
❌ Những học sinh tham gia kỳ thi phải có mặt lúc 8 giờ.
✅ Các học sinh tham gia kỳ thi phải có mặt lúc 8 giờ.
This is a formal announcement directed at every student sitting the exam — a complete, defined group. Các correctly signals that the rule applies to all of them without exception.
Quick Quiz
Fill in the blank with những or các:
- _____ em học sinh trong lớp đều làm bài tập về nhà hôm qua.
Hint: The word đều (all/every) appears in the sentence, confirming that every student in the class is included — a complete, defined group.
Answer
Các — Các em học sinh trong lớp đều làm bài tập về nhà hôm qua. (All the students in the class did their homework yesterday.) The combination of a defined group (the class) and the word đều confirms that các is the right choice here.
- Tôi nhớ _____ kỷ niệm đẹp khi còn học ở Việt Nam.
Hint: The speaker is sharing a personal, emotional memory — certain cherished moments, not every moment that has ever occurred.
Answer
Những — Tôi nhớ những kỷ niệm đẹp khi còn học ở Việt Nam. (I remember the beautiful memories from when I was studying in Vietnam.) Emotional and nostalgic sentences about personal experiences always use những. Using các here would sound oddly formal and detached.
- _____ nước thành viên ASEAN sẽ tham dự hội nghị vào tuần tới.
Hint: This is a formal news-style sentence about the entire membership of an official organization — every member country, no exceptions.
Answer
Các — Các nước thành viên ASEAN sẽ tham dự hội nghị vào tuần tới. (All ASEAN member countries will attend the conference next week.) Các is correct because the sentence refers to the complete, officially defined group of member states in a formal context.