Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chiet tach, chieu sang
hieu lang » chieu sang, hieu quang, nhieu tang
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cau » toan cao, toan ban, toan tap
va dung » van dung, va duong, vat dung

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

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