Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trang » thanh trung, canh tranh, minh trang
hanh trinh » canh tranh, hanh chinh
dong thanh » truong thanh
ho chieu » theo chieu, hoc thieu, doi chieu
cong san » cong tac
toan cao » toan ban, toan tap

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