Perhaps you should try some spelling variations:
chiet tach » chieu sach
manh trung » manh tung, thanh trung, manh hung
ho chiet » ho chieu, ho thiet, hoc thiet
trung cu » trung cua, trung cau, trung vu
cu luong » cat luong, huy luong, do luong
cong san » cong tac
cong tan » cong tac, cong thanh, cong ty

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