Perhaps you should try some spelling variations:
manh trung » manh tung, thanh trung, manh hung
hang cong » dang cong, hang nong, bang cong
dien anh » tieng anh, dien dan
trung va » truong va, trang va, trung ha
cong tac » cong ty
than cao » toan cao, than cap, than sao
thai cao » tai cao, thoai cac, thuat cao
va hang » van hang, va nang, va lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((dien sach) or (dien anh)) - manh trung va hang cong tac ((than cao) or (thai cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((dien sach) OR (dien anh)) - manh trung va hang cong tac ((than cao) OR (thai cao)).
• Adding a wildcard symbol may retrieve word variants: doc ((dien sach) or (dien anh)) - manh trung va hang cong tac ((than cao) or (thai cao))*.