Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
cua dung » cua dang, cua dong, qua dung
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
cac ban » cac dan, cac van, can ban
chan tu » phan tu, han tu, chon tu

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 - cac ban ((cua dung) or (qua song)) ((cong dan) OR (cong san)) chan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - cac ban ((cua dung) OR (qua song)) ((cong dan) OR (cong san)) chan tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - cac ban ((cua dung) or (qua song)) ((cong dan) OR (cong san)) chan tu".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - cac ban ((cua dung) or (qua song)) ((cong dan) OR (cong san)) chan tu*.