Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
hanh dong » anh dong, ha dong
dung cong » dung trong
nhan dan » phan dau, gian dan, nhan tai
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 - ((nhan dan) or (hanh dong)) cua dung cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - ((nhan dan) OR (hanh dong)) cua dung cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - ((nhan dan) or (hanh dong)) cua dung cong tac toan cau*.