Perhaps you should try some spelling variations:
thanh trung » thanh tung
chiet tach » chieu sach
ho chiet » ho chieu, ho thiet, hoc thiet
trung ha » trung hoc, trung tam, trung cap
cong tan » cong tac, cong san, cong thanh
than cau » toan cau, phan cau, than cap
ha cong » hoa cong, va cong, ha dong

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chiet tach - thanh trung ha cong ((huong dan) or (cong tan)) than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - thanh trung ha cong ((huong dan) OR (cong tan)) than cau.
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - thanh trung ha cong ((huong dan) or (cong tan)) than cau*.