Perhaps you should try some spelling variations:
trinh dang » trinh dung, trinh dan, trinh bang
canh trinh » canh tranh, hanh trinh, canh tinh
dang bang » dong bang, dang dang, tang bang
bang cong » dang cong, bang song, hang cong
theo chu » theo chieu, cho chu, chao chu
cong dan » cong san, cong tan, huong dan
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.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chu) OR (theo tieu)) sach - canh trinh dang bang cong dan toan cau~.
• Adding a wildcard symbol may retrieve word variants: ((theo chu) or (theo tieu)) sach - canh trinh dang bang cong dan toan cau*.