Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
truong cao » truong dai
doi chieu » doc hieu, doi chi, ho chieu
trung cao » trung cap, trung co, trung ca
trong dan » trong dang, trong tan, trong ban
trong san » trong cac, cong san, dong san
toan ban » van ban

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 cao) OR (truong cao)) dang ((trong dan) or (trong san)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - thanh ((trung cao) OR (truong cao)) dang ((trong dan) OR (trong san)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - thanh ((trung cao) OR (truong cao)) dang ((trong dan) or (trong san)) toan ban".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - thanh ((trung cao) OR (truong cao)) dang ((trong dan) or (trong san)) toan ban*.