Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
dung huong » dung thuong, dung phuong, dong huong
doi chieu » doc hieu, doi chi, ho chieu
tung hai » trung hai, dung hai, sung hai
hung hai » hung thai, hang hai, dung hai
than ban » thanh ban, than man, nhuan ban
toan ban » van ban

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

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