Perhaps you should try some spelling variations:
nhieu tang » chieu sang, nhiet nang
thanh tran » thanh trang, thanh toan, thanh tra
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
hieu lang » chieu sang, hieu quang, hieu van
tran van » luan van
van toan » van tuan, van tan, van thanh
toan ban » van ban

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) OR (nhieu tang)) - thanh tran van ((nhung cong) or (thong cong)) van toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((hieu lang) OR (nhieu tang)) - thanh tran van ((nhung cong) OR (thong cong)) van toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((hieu lang) OR (nhieu tang)) - thanh tran van ((nhung cong) or (thong cong)) van toan ban".
• Adding a wildcard symbol may retrieve word variants: doi ((hieu lang) OR (nhieu tang)) - thanh tran van ((nhung cong) or (thong cong)) van toan ban*.