Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
tranh cua » doanh cua, manh cua
cua khong » hua khong, cua phuong, cua thuong
chinh can » chinh ca, chinh ban, chinh cau
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sach - canh tranh cua khong ((cong dan) OR (cong tan)) chinh can~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - canh tranh cua khong ((cong dan) OR (cong tan)) chinh can".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - canh tranh cua khong ((cong dan) OR (cong tan)) chinh can*.