Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
hang cong » dang cong, hang nong, bang cong
ho chieu » theo chieu, doi chieu, mot chieu
tram van » tran van, trang van, tranh van
cong tac » cong ty
tac phan » tac pham, tai phan, tac phat
phan tap » phan lap, han tap, pha tap
tam van » nam van, dam van, tom van

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

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