Perhaps you should try some spelling variations:
trinh quan » tinh quang, trinh han
nha hieu » nha dieu, nghe hieu, phan hieu
nho sieu » nho hieu, nghe sieu, hoc sieu
ban cong » bang cong, van cong, phan cong
cong tac » cong ty
tac tran » tan tran, tac trai, tac tren
tran cau » tran chau, toan cau, ran cau

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

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