Questions & Answers about Thợ máy thay dầu.
- thợ = worker, craftsperson, tradesperson
- máy = machine
- thợ máy = mechanic
- thay = change, replace
- dầu = oil
So the sentence is literally something like mechanic change oil.
Because Vietnamese spelling usually separates syllables with spaces, even when those syllables form one lexical word or fixed expression.
So thợ máy is best learned as one compound noun meaning mechanic, not as two separate English-style words in the sentence.
This is very common in Vietnamese:
- xe máy = motorbike
- bệnh viện = hospital
- học sinh = student