Perhaps you should try some spelling variations:
trinh qua » trinh quan, trinh quang, trinh luat
trinh cua » tinh cua, trinh luat, trinh quan
nho hieu » nha hieu, nho sieu, nhu hieu
ban cong » bang cong, van cong, phan cong
cong tac » cong ty
tac tren » rac tren, tai tren, tap tren
tren tau » tren thuc, tren may, tren dat
ho hieu » ho chieu, hoi hieu, co hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho hieu) OR (nho hieu)) quang - hanh ((trinh qua) or (trinh cua)) ban cong tac tren tau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho hieu) OR (nho hieu)) quang - hanh ((trinh qua) OR (trinh cua)) ban cong tac tren tau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho hieu) OR (nho hieu)) quang - hanh ((trinh qua) or (trinh cua)) ban cong tac tren tau".
• Adding a wildcard symbol may retrieve word variants: ((ho hieu) OR (nho hieu)) quang - hanh ((trinh qua) or (trinh cua)) ban cong tac tren tau*.