Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thong cong » trong cong, tong cong, thong thong
doi chieu » doc hieu, doi chi, ho chieu
trung cap » truong cao, trung tam
ban thanh » ban hanh, ban hang
dung cua » dung luan, dung cho
van than » van thanh, van thang, van tuan

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 ((dung cua) or (trung cap)) thong cong ((ban thanh) or (van than)) cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - thanh ((dung cua) OR (trung cap)) thong cong ((ban thanh) OR (van than)) cap.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - thanh ((dung cua) or (trung cap)) thong cong ((ban thanh) or (van than)) cap*.