Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, hang cong
ho chieu » theo chieu, hoc thieu, doi chieu
trinh va » trinh van, trinh vat, trinh ve
cong tan » cong tac, cong san, cong thanh
tran cau » tran chau, ran cau, tra cau
toan cau » toan cao, toan tap, toan tai
toan ban » van ban

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 va nhung cong tan ((((tran cau) OR (toan cau))) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - hanh trinh va nhung cong tan ((((tran cau) OR (toan cau))) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - hanh trinh va nhung cong tan ((((tran cau) OR (toan cau))) or (toan ban))".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hanh trinh va nhung cong tan ((((tran cau) OR (toan cau))) or (toan ban))*.