Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
quang tuan » quang thanh, quan luan, quang cua
cong thanh » dong thanh, cong trinh, cong tan
doi chieu » doc hieu, doi chi, mot chieu
anh quang » anh xquang, anh quan, nhanh quang
tuan hung » tran hung, luan hung, tuan dung
cong tap » cuong tap, cong tac, cong tan
toan cau » toan cao, toan ban, toan tap

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