Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh hang » thanh hang, hang hang, hanh han
ho chieu » theo chieu, hoc thieu, doi chieu
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap

You may be able to get more results by adjusting your search query.

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