Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
canh trinh » canh tranh, hanh trinh, canh tinh
trinh vat » trinh van, trinh luat, sinh vat
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, doi chieu
anh toan » manh toan, anh tuan, thanh 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 - canh trinh vat ((trong cong) or (dung cong)) anh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - canh trinh vat ((trong cong) OR (dung cong)) anh toan cau.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - canh trinh vat ((trong cong) or (dung cong)) anh toan cau*.