Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
danh trung » dang trung, dinh trung, manh trung
manh tung » manh hung, thanh tung
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, doi chieu
qua dung » quang dung, su dung, qua song
cong san » cong tac
san toan » van toan, dan toan, 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: ho chieu sach - ((danh trung) or (manh tung)) qua dung cong san toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - ((danh trung) OR (manh tung)) qua dung cong san toan cau.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - ((danh trung) or (manh tung)) qua dung cong san toan cau*.