Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
danh trung » dang trung, dinh trung, manh trung
doi chieu » doc hieu, doi chi, ho chieu
manh hung » anh huong
trong dan » trong dang, trong san, trong tan
cua dung » cua dang, cua dong, qua dung
dan toan » van toan, dan than, manh 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 - ((danh trung) or (manh hung)) cua dung trong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - ((danh trung) OR (manh hung)) cua dung trong dan toan cau.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - ((danh trung) or (manh hung)) cua dung trong dan toan cau*.