Perhaps you should try some spelling variations:
dung cong » dung trong
van thanh » ban thanh, van tuan
nho hieu » nha hieu, nho sieu, nghe hieu
nhu hieu » nhu hien, nha hieu, nhu dieu
tranh va » tranh van, trang va, trinh va
ban than » ban thanh, ban hang, ban hanh
va dung » van dung, va duong, vat dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((nho hieu) OR (nhu hieu)) lang - canh tranh va dung cong ((ban than) or (van thanh)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((nho hieu) OR (nhu hieu)) lang - canh tranh va dung cong ((ban than) OR (van thanh)) tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((nho hieu) OR (nhu hieu)) lang - canh tranh va dung cong ((ban than) or (van thanh)) tap".
• Adding a wildcard symbol may retrieve word variants: ((nho hieu) OR (nhu hieu)) lang - canh tranh va dung cong ((ban than) or (van thanh)) tap*.