Do

conjunction

Means:

Caused by / By, used to express the cause-result relationship, the origin or the state of dependence of things.

Example:

Món nem này do tôi làm.
The meat roll is made by me.
Anh ấy bị đau dạ dày do uống quá nhiều rượu.
He has a stomachache due to drinking too much alcohol.

Tip:

The conjunction "do" can be placed at the beginning of a sentence to express the cause.

Do uống nhiều rượu nên anh ấy bị đau dạ dày.
Because he drank a lot of alcohol, he had a stomachache.