Perhaps you should try some spelling variations:
chau tinh » cuu tinh, ha tinh, cua tinh
hang cong » dang cong, hang nong, bang cong
tram van » tran van, trang van, tranh van
cong tac » cong ty
tam van » nam van, dam van, tom van
tac han » tac nhan, tac ha, tac can
han tap » han tai, toan tap, nhan tai
o chau » a chau, 3 chau, moc chau

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

• Performing a fuzzy search may retrieve terms with similar spellings: o chau tinh - hanh ((tram van) or (tam van)) hang cong tac han tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: o chau tinh - hanh ((tram van) OR (tam van)) hang cong tac han tap.
• Adding a wildcard symbol may retrieve word variants: o chau tinh - hanh ((tram van) or (tam van)) hang cong tac han tap*.