Perhaps you should try some spelling variations:
thanh trung » thanh tung
nhieu tang » chieu sang, nhiet nang
hieu lang » chieu sang, hieu quang, hieu van
cua dung » cua dang, cua dong, qua dung
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: nhu ((nhieu tang) or (hieu lang)) - thanh trung ((cua dung) or (cua cong)) cong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nhu ((nhieu tang) OR (hieu lang)) - thanh trung ((cua dung) OR (cua cong)) cong dan toan cau.
• Adding a wildcard symbol may retrieve word variants: nhu ((nhieu tang) or (hieu lang)) - thanh trung ((cua dung) or (cua cong)) cong dan toan cau*.