Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
tang luan » dung luan
tuong dan » huong dan, tung dan, xuong dan
tang cua » mang cua, hang cua, thong cua
cong dan » cong san, cong tan, huong dan
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: theo chieu sach - hanh ((tang cua) OR (tang luan)) ban ((cong dan) or (tuong dan)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - hanh ((tang cua) OR (tang luan)) ban ((cong dan) OR (tuong dan)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - hanh ((tang cua) OR (tang luan)) ban ((cong dan) or (tuong dan)) toan cao".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - hanh ((tang cua) OR (tang luan)) ban ((cong dan) or (tuong dan)) toan cao*.