Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
thanh ban » thanh san, thanh van, thanh bac
cua nhung » va nhung
hanh ban » hang ban, hanh san, hanh han
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu sach - ((hanh ban) OR (thanh ban)) cua nhung ((cong dan) or (cong san)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - ((hanh ban) OR (thanh ban)) cua nhung ((cong dan) OR (cong san)) toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - ((hanh ban) OR (thanh ban)) cua nhung ((cong dan) or (cong san)) toan tap".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - ((hanh ban) OR (thanh ban)) cua nhung ((cong dan) or (cong san)) toan tap*.