# Cơ: that one, not this; but you said in Vietnamese (B1)

> This one belongs to Hà Nội. Northern speakers often end a sentence with cơ; Saigon speakers rarely do.

Source: https://vietnamesebuddy.com/grammar/co-insist-north/ · Updated 2026-10-17

**that one, not this; but you said …**

Pattern: `[the right one] + cơ! · [what was said] + cơ mà! · [amount] + cơ (a whole …) · Gì cơ? (sorry, what?)`

Level: B1 (our estimate) · Register: everyday · Medium: spoken · Hà Nội only

Typed without accents: co, co ma

This one belongs to Hà Nội. Northern speakers often end a sentence with *cơ*; Saigon speakers rarely do. You'll meet it from Northern friends and colleagues, and in films and on TV, so it's worth recognising, but you don't need to say it. Saigon has no single word for it: where Hà Nội says *cơ*, Saigon uses *mà* to insist, *lận* after a big amount, and *Hả?* or *Dạ?* to ask again.

*Cơ* insists on the right one, not what someone else picked or thought. A child pointing past a toy says *Con muốn cái kia cơ!* I want that one! It can sound coaxing, the way a child asks. After an amount, it means "a whole …": *Vé máy bay hết năm triệu cơ!* The plane ticket cost a whole five million! In Saigon, that's *tới năm triệu lận*.

*Cơ mà* at the end means "but you said" or "but I told you": *Anh bảo sẽ đến cơ mà!* But you said you'd come! In Saigon, a plain *mà* does that job: *Anh nói sẽ tới mà!* At the start of a sentence, *Cơ mà …* is simply a casual "but".

In a question, *cơ* asks someone to say it again. *Gì cơ?* and *Sao cơ?* both mean "Sorry, what?" A Saigon speaker says *Hả?*, or politely *Dạ?*

## Examples

- Con không thích cái này, con muốn cái kia cơ! — I don't like this one, I want that one!
- Anh bảo hôm nay sẽ đến cơ mà! — But you said you'd come today!
- Vé máy bay hết năm triệu cơ! — The plane ticket cost a whole five million!
- Gì cơ? Anh nói lại được không? — Sorry, what? Could you say that again?

## Compare

- [I told you! … mà at the end](https://vietnamesebuddy.com/grammar/ma-final-insist/): (insisting, that's why)
- [Only so few, as many as: có + number, tới … lận / những + number](https://vietnamesebuddy.com/grammar/nhung-number-as-many/): only (small) / as many as (large)
- [Double-checking what you just heard: hả / à](https://vietnamesebuddy.com/grammar/a-ha-check/): …, huh? / so …?

Previous in Words at the start and end of a sentence: [I'm off now, what now? … đây at the end](https://vietnamesebuddy.com/grammar/day-final/)
Next in Words at the start and end of a sentence: [It turns out: hóa ra, thì ra](https://vietnamesebuddy.com/grammar/hoa-ra-turns-out/)

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