Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
trinh can » trinh han, trinh san, trinh cau
bang cong » dang cong, bang song, hang cong
ho chieu » theo chieu, hoc thieu, doi chieu
can bang » cao bang, can ban, van ban
cong tan » cong tac, cong san, cong thanh
ban can » ban dan, ban hang, ban hanh
ban cau » bang cau, van cau, ban dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sach - hanh trinh can bang cong tan ((ban can) or (ban cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - hanh trinh can bang cong tan ((ban can) OR (ban cau)).
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hanh trinh can bang cong tan ((ban can) or (ban cau))*.