Perhaps you should try some spelling variations:
trung thanh » truong thanh
chiet tach » chieu sach
truong cao » truong dai
hang cong » dang cong, hang nong, bang cong
san thanh » ban thanh, van thanh, son thanh
thanh cau » thanh chau, thanh mau, nhanh cau
ho chiet » ho chieu, ho thiet, hoc thiet
cong san » cong tac

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