Perhaps you should try some spelling variations:
thanh trung » thanh tung
hieu lang » chieu sang, hieu quang, nhieu tang
trong san » trong cac, cong san, dong san
tan dung » tran dung, van dung, dan dung
san toan » van toan, dan toan, manh toan
toan cau » toan cao, toan ban, toan tap
ho hieu » ho chieu, hoi hieu, nho hieu

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 - thanh trung ((tan dung) or (tin dung)) trong san toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - thanh trung ((tan dung) OR (tin dung)) trong san toan cau.
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - thanh trung ((tan dung) or (tin dung)) trong san toan cau*.