Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh
quan hanh » quan thanh, quang thanh, quang khanh
ho chieu » theo chieu, hoc thieu, doi chieu
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
phan cau » phan dau, phan cac, phan tu

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