Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
trung cua » truong cua, trung tuan, dung cua
trung cap » truong cao, trung tam
cong doan » cong dan, dong doanh, cong san
cong hoan » cong hoa, dong hoa, cong san
hang dau » hang va, hang tai

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 - thanh ((trung cua) OR (trung cap)) dung ((cong doan) or (cong hoan)) hang dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - thanh ((trung cua) OR (trung cap)) dung ((cong doan) OR (cong hoan)) hang dau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - thanh ((trung cua) OR (trung cap)) dung ((cong doan) or (cong hoan)) hang dau".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - thanh ((trung cua) OR (trung cap)) dung ((cong doan) or (cong hoan)) hang dau*.