Perhaps you should try some spelling variations:
thanh trung » thanh tung
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
tran thanh » ban thanh, van thanh, quan thanh
dung cong » dung trong
tan thanh » tang thanh, toan thanh, ban thanh
trung ha » trung hoc, trung tam, trung cap
ha dung » hai dung, hat dung, kha 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 chieu sach - thanh trung ha dung cong ((tan thanh) or (tran thanh)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - thanh trung ha dung cong ((tan thanh) OR (tran thanh)) cau.
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - thanh trung ha dung cong ((tan thanh) or (tran thanh)) cau*.