Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
canh trinh » canh tranh, hanh trinh, canh tinh
quan nhung » qua nhung, cua nhung, luan chung
nhung tinh » khuong tinh, nhung thanh, thuong tinh
qua chung » qua chuong, quat chung, cua chung
ho chieu » theo chieu, hoc thieu, doi chieu
toan cau » toan cao, toan ban, toan tap

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - canh trinh ((quan nhung) OR (qua chung)) nhung tinh toan cau~.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - canh trinh ((quan nhung) or (qua chung)) nhung tinh toan cau*.