Perhaps you should try some spelling variations:
chiet tach » chieu sach
truong cao » truong dai
dung cong » dung trong
ho chiet » ho chieu, ho thiet, hoc thiet
tung cap » trung cap, cung cap, thong cap
cong tan » cong tac, cong san, cong thanh
tran cau » tran chau, toan cau, ran cau

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 ((tung cap) or (truong cao)) dung cong tan tran cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - thanh ((tung cap) OR (truong cao)) dung cong tan tran cau.
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - thanh ((tung cap) or (truong cao)) dung cong tan tran cau*.