Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
tranh cua » doanh cua, manh cua
chu sang » chu bang, thu sang, chieu sang
cua dung » cua dang, cua dong, qua dung
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
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 ((chu sang) or (chieu sach)) - canh tranh cua dung ((cong dan) OR (cong tan)) khan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu sang) OR (chieu sach)) - canh tranh cua dung ((cong dan) OR (cong tan)) khan cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chu sang) or (chieu sach)) - canh tranh cua dung ((cong dan) OR (cong tan)) khan cap".
• Adding a wildcard symbol may retrieve word variants: theo ((chu sang) or (chieu sach)) - canh tranh cua dung ((cong dan) OR (cong tan)) khan cap*.