Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
doi chieu » doc hieu, doi chi, ho chieu
cua dang » cua cong
cong san » cong tac
san than » sang than, san thanh, ban than
than cau » toan cau, phan cau, than cap

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 sach - hanh trinh ((cua dang) or (cua ban)) cong san than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - hanh trinh ((cua dang) OR (cua ban)) cong san than cau*.