Perhaps you should try some spelling variations:
nhieu tang » chieu sang, nhiet nang
thong cong » trong cong, tong cong, thong thong
hieu lang » chieu sang, hieu quang, hieu van
hanh tran » hanh trang, thanh tran, hanh tram
van thong » van thuong, van phong, va thong
tran van » luan van
dan toan » van toan, manh toan, xuan toan
dan than » dan chan, ban than, van than

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu lang) OR (nhieu tang)) - hanh tran van thong cong ((dan toan) OR (dan than)) ban~.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu lang) or (nhieu tang)) - hanh tran van thong cong ((dan toan) or (dan than)) ban*.