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
trinh cua » tinh cua, trinh luat, trinh quan
cong cong » trong cong, dung cong, dang cong
van than » van thanh, van thang, van tuan
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 ((cong cong) or (cong dong)) van than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - hanh trinh cua ((cong cong) OR (cong dong)) van than cau.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - hanh trinh cua ((cong cong) or (cong dong)) van than cau*.