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

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