Perhaps you should try some spelling variations:
truong trung » tieng trung
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
tran thanh » ban thanh, van thanh, quan thanh
dang cong » dung cong
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than cap » khan cap, thanh lap, thanh cac

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 ((truong trung) or (tran thanh)) dang cong tan than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - thanh ((truong trung) OR (tran thanh)) dang cong tan than cap.
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - thanh ((truong trung) or (tran thanh)) dang cong tan than cap*.