Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, mot chieu
cong tap » cuong tap, cong tac, tong tap
cong tan » cong tac, cong san, cong thanh
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap
anh tan » anh tuan, anh toan, anh tang

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 - anh tan tran quang ((cong tap) or (cong tan)) ((toan cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - anh tan tran quang ((cong tap) OR (cong tan)) ((toan cau) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - anh tan tran quang ((cong tap) or (cong tan)) ((toan cau) or (toan cao))*.