Perhaps you should try some spelling variations:
thanh trung » thanh tung
doi chieu » doi chi, ho chieu, mot chieu
doc hieu » toc thieu, hoc thieu, hoc hien
cuu nang » chuc nang, cam nang, cao nang
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) or (doc hieu)) xanh - thanh trung ((cuu nang) or (cuu van)) cong tan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (doc hieu)) xanh - thanh trung ((cuu nang) OR (cuu van)) cong tan than cau.
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (doc hieu)) xanh - thanh trung ((cuu nang) or (cuu van)) cong tan than cau*.