Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
tanh dong » thanh dong, hanh dong, tach dong
dung cong » dung trong
anh dong » anh huong, anh son
cua dung » cua dang, cua dong, qua dung
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
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 - ((tanh dong) or (anh dong)) cua dung cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - ((tanh dong) OR (anh dong)) cua dung cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - ((tanh dong) or (anh dong)) cua dung cong tac toan cau*.