Vietnamese friends give advice the way they give you food: constantly, warmly, and whether you asked or not. You sneeze once and somebody says you should drink hot water. You mention you're going to District 1 at 5pm and three people tell you not to. Good news — the language for all this is small. Five little moves and you can join in.
Quick answer: Put nên in front of the verb for "should", hổng nên for "shouldn't", thử… coi for "give it a try and see", tốt nhất là for "the best thing is", and nếu tui là bạn for "if I were you" — then soften the whole thing with nha or nghen so you sound like a friend, not a boss.
1. The workhorse: nên
Nên sits right before the verb, exactly where "should" sits in English. That's it. No conjugation, no drama.
Want to compare two options? Stick hơn at the end.
Common mistake
Learners reach for phải ("must") when they mean nên. Saying Bạn phải đi sớm to a friend sounds like you're their supervisor. Nên is the friendly one. Save phải for real obligations — visas, deadlines, your landlord.
2. Telling someone not to: hổng nên and đừng
In Saigon you'll hear hổng nên (or hông nên) far more than the textbook form. It's the same word, just the Southern mouth.
Đừng is more direct — closer to "don't". Between friends it's completely normal, especially with có after it, which adds a nice "come on, seriously" flavour.
3. "Just try it and see": thử… coi
This one is pure Saigon and you'll use it every day. Sandwich the verb: thử + verb + coi. It means "try it and see how it goes" — advice with zero pressure, because you're not claiming to be right, you're just inviting them to test it.
Local tip
Cứ… đi ("go ahead and…") is the encouragement version of advice. It's what a friend says when you're hesitating: Cứ kêu món đi, tui trả — "Go ahead and order, I'm paying." Pair it with đại ("just do it roughly, don't overthink") and you sound extremely local.
4. Turning advice into a shared plan: hay là…
Sometimes the kindest advice doesn't sound like advice at all. Hay là means "or how about…" and it makes your idea feel like a group decision.
5. The strong one: tốt nhất là
When you really do think there's one right answer, tốt nhất là ("the best thing is") is your move. It's firm but still friendly, because you're recommending, not ordering.
6. "If I were you": nếu tui là bạn
Beautifully simple in Vietnamese — no past tense gymnastics, no subjunctive. Just nếu tui là + the person, then say what you'd do. Adding luôn at the end gives it that "honestly, I'd just do it" energy.
7. Softening, so you don't come across bossy
This is the part learners skip, and it's the part that makes you sound kind. Three cheap tricks:
Theo tui ("in my view"), chắc ("probably"), chút ("a bit") and a final nha / nghen — sprinkle any two and your advice lands like a friend's hand on your shoulder instead of a lecture.
Good to know
Regret about the past — "you should have…" — uses đáng lẽ: Đáng lẽ bạn nên hỏi giá trước, "You should have asked the price first." Very handy after you've been overcharged for mango.
8. What to say when someone advises you
Advice in Saigon is a two-way street. You'll receive plenty, so have a reply ready. Don't just nod.
Southern vs Northern: how the advice words shift
| Meaning | Southern (Saigon) | Northern (Hanoi) |
|---|---|---|
| shouldn't | hổng nên / hông nên | không nên |
| try it and see | thử… coi | thử… xem |
| if I were you | nếu tui là bạn | nếu tôi là cậu |
| let me check first | để tui coi lại cái đã | để tớ xem lại đã |
| expensive (in warnings) | mắc | đắt |
| softening tag | nha / nghen / hen | nhé |
| my mom told me to… | má tui kêu tui… | mẹ tớ bảo tớ… |
Everything else in this post — nên, tốt nhất là, hay là, đáng lẽ — is the same nationwide. It's really just the "no", the "see", and the friendly tag that change.
Try it yourself
- Your friend wants to ride into town at 5pm. Warn them gently with nên + nghen.
- Recommend a coffee shop using thử… coi.
- Tell someone not to buy a phone at a certain shop because it's expensive.
- Say "If I were you, I'd ask the price first."
- Someone gives you advice. Accept it warmly in one short line.
Answers: 1. Bạn nên đi sớm chút nghen, năm giờ kẹt xe quá trời. · 2. Bạn thử quán cà phê đó coi, ngon lắm. · 3. Đừng có mua điện thoại ở đó, mắc lắm. · 4. Nếu tui là bạn, tui hỏi giá trước. · 5. Ừ, để tui thử coi. Cám ơn nha.
Frequently asked questions
Is nên ever rude?
Almost never — it's the polite default. It only gets sharp if you stack it with a heavy tone and no softener, like barking Bạn nên im lặng. Add chút, chắc or a final nha and it's warm again.
What's the difference between nên and phải?
Nên is "should" — your opinion, take it or leave it. Phải is "must" — no choice involved. Telling a friend they phải eat breakfast sounds like a rule; telling them they nên eat breakfast sounds like you care.
Can I use thử… coi about myself?
Yes, all the time. Để tui thử coi means "let me give it a shot and see." It's the standard way to accept a suggestion without over-promising.
Do I need sẽ in nếu tui là bạn, tui…?
You can add it, but in everyday Saigon speech people usually skip it and let context do the work. Nếu tui là bạn, tui nghỉ liền is perfectly natural.
How do I turn down advice without being rude?
Acknowledge first, hedge second: Dạ con biết rồi, để con coi lại cái đã nha. The acknowledgement is doing all the politeness work — a flat "no" with no cushion is what feels cold.
Where can I practise this with a real person?
Advice is a conversation skill, not a flashcard skill — you need someone to give you a problem and react to your suggestion. That's exactly what happens in a lesson when you learn Southern Vietnamese online with a teacher who grew up hearing thử coi every day.
Learn Southern Vietnamese online with people who actually speak it
SVFF is the school built entirely around the Southern (Saigon) dialect — native teachers from Ho Chi Minh City, since 2014.
- Listen to the SVFF podcast — real Southern Vietnamese, free.
- Book a free trial lesson — 30 minutes 1-on-1 with a native Saigon teacher.
- Browse our courses — structured A0–C1, all Southern dialect.
- Go Unlimited — every course and e-textbook, one payment.
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