Perhaps you should try some spelling variations:
thanh dung » thanh duong, thanh tung, thanh hung
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
hieu lang » chieu sang, hieu quang, nhieu tang
doi hieu » doi chieu, doc hieu, doi hien
dung cua » dung luan, dung cho
ban than » ban thanh, van thanh, ban hang
than cap » khan cap, thanh lap, thanh cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi hieu lang - thanh dung cua ((nhung cong) or (thong cong)) ban than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - thanh dung cua ((nhung cong) OR (thong cong)) ban than cap.
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - thanh dung cua ((nhung cong) or (thong cong)) ban than cap*.