Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
cong thanh » dong thanh, cong trinh, truong thanh
trinh can » trinh han, trinh san, trinh cau
ho chieu » theo chieu, hoc thieu, doi chieu
can bang » cao bang, can ban, van ban
cong tan » cong tac, cong san, cong ty
tban cau » toan cau, toan cao, ban can
ban cau » bang cau, ban can, van cau

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) OR (cong thanh)) ((tban cau) 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) OR (cong thanh)) ((tban cau) OR (ban cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - hanh trinh can bang ((cong tan) OR (cong thanh)) ((tban cau) or (ban cau))".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hanh trinh can bang ((cong tan) OR (cong thanh)) ((tban cau) or (ban cau))*.