Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu xanh » chieu xanh, hieu manh, thien anh
chieu tinh » trieu tinh, lieu tinh, chau tinh
trung van » truong van, trong van, trung va
dung cong » dung trong
van dung » van dong, xay dung, tin dung
cong tac » cong ty
tac tren » rac tren, tai tren, tap tren
tren tau » tren thuc, tren may, tren dat

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu xanh) or (chieu tinh)) - thanh trung van dung cong tac tren tau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (chieu tinh)) - thanh trung van dung cong tac tren tau.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (chieu tinh)) - thanh trung van dung cong tac tren tau*.