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
toan tap » toan ban
ho chau » ha chau, ho chu, o chau
tam van » nam van, dam van, tom van
han tap » han tai, nhan tai, nhan tao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chau tinh - hanh ((tram van) or (tam van)) hang cong tac ((han tap) OR (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chau tinh - hanh ((tram van) OR (tam van)) hang cong tac ((han tap) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chau tinh - hanh ((tram van) or (tam van)) hang cong tac ((han tap) OR (toan tap))".
• Adding a wildcard symbol may retrieve word variants: ho chau tinh - hanh ((tram van) or (tam van)) hang cong tac ((han tap) OR (toan tap))*.