Perhaps you should try some spelling variations:
tieu sach » chieu sach, dien sach, te sach
mang luan » tang luan, bang luan, mong luan
hang luan » tang luan, dung luan
dang cong » dung cong
cong dan » cong san, cong tan, huong dan
toan cao » toan tap
toan ban » van 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 tieu sach - hanh ((mang luan) or (hang luan)) dang cong dan ((toan cao) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - hanh ((mang luan) OR (hang luan)) dang cong dan ((toan cao) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu sach - hanh ((mang luan) or (hang luan)) dang cong dan ((toan cao) OR (toan ban))".
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - hanh ((mang luan) or (hang luan)) dang cong dan ((toan cao) OR (toan ban))*.