Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
manh trung » manh tung, thanh trung, manh hung
trung cap » truong cao, trung tam
cap nhung » cam nhung, vap nhung, dap nhung
cong dan » cong san, cong tan, huong dan
cong tac » cong ty
khan cap » khan ap, than cap, khoan cam

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) OR (chiet tach)) - manh trung cap nhung ((cong dan) or (cong tac)) khan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chiet tach)) - manh trung cap nhung ((cong dan) OR (cong tac)) khan cap*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) OR (chiet tach)) - manh trung cap nhung ((cong dan) or (cong tac)) khan cap*".