Describing a noun with a verb phrase, no 'who / which': người tới hôm qua

To describe a noun by what it does, put the verb phrase straight after the noun, with nothing in between: người tới hôm qua (the person who came yesterday; in Hà Nội đến), chị bán bánh mì (the woman who sells bánh mì), xe đi Vũng Tàu (the bus that goes to Vũng Tàu). English needs "who", "which" or "that"; Vietnamese simply follows the noun with the description, the same way it follows a noun with an adjective: áo đẹp, người tới hôm qua.

Mà doesn't go here. It joins only when the noun is what the action is done to, with the doer in between: cái áo (mà) em mua. That has its own page.

Này, đó and kia go at the very end, after the whole description: Chị đứng ở cửa đó là ai vậy? Who's that woman standing at the door?

Some of these have become ordinary words: người bán hàng (shop assistant), người lái xe (driver). The pattern is the same; you just meet them so often that they feel like one word.