Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hieu lang » chieu sang, hieu quang, nhieu tang
van thanh » ban thanh, van tuan
nhung bo » nhung bi, nhung bai, nhung don
dan than » dan chan, ban than, van than
ho hieu » ho chieu, hoi hieu, nho hieu
can ban » van ban, toan ban

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

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