Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
dung cong » dung trong
cong sang » cong san, cong lang, cong vang
sang than » cang thang, dang thanh, sang tao
ho chieu » theo chieu, hoc thieu, doi chieu
tran van » luan van
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sach - thanh ((tran van) or (trung quoc)) dung cong sang than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - thanh ((tran van) OR (trung quoc)) dung cong sang than cau.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh ((tran van) or (trung quoc)) dung cong sang than cau*.