Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
doi chieu » doc hieu, ho chieu, mot chieu
trinh van » trinh han, trinh quan, trinh toan
dang cong » dung cong
van dang » van dong, van dung, van nang
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan tap » toan ban
doi chi » doi khi

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) or (doi chi)) sach - canh trinh van dang cong dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (doi chi)) sach - canh trinh van dang cong dan toan tap.
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (doi chi)) sach - canh trinh van dang cong dan toan tap*.