Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
va thong » va thuong, va phuong, he thong
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
phan cac » nhan cach, phan dau, phan lap
va tong » va tuong, va trong, va cong

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 ((va tong) or (va thong)) ((cong dan) OR (cong tan)) phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - canh tranh ((va tong) OR (va thong)) ((cong dan) OR (cong tan)) phan cac.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - canh tranh ((va tong) or (va thong)) ((cong dan) OR (cong tan)) phan cac".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - canh tranh ((va tong) or (va thong)) ((cong dan) OR (cong tan)) phan cac*.