Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
tung bay » vung bay, tuong ban, tung dan
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
tung ap » tang ap, tung dan, tung mai
ban cau » bang cau, ban can, van cau

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