Perhaps you should try some spelling variations:
chieu sach » chiet tach, chieu sang, chieu xanh
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
luan dang » luan nang, luan danh, luan dong
dang cong » dung cong
cong san » cong tac
toan ban » van ban
toan cao » 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) OR (chinh sach)) - hanh tang luan dang cong san ((toan ban) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chinh sach)) - hanh tang luan dang cong san ((toan ban) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) OR (chinh sach)) - hanh tang luan dang cong san ((toan ban) or (toan cao))".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) OR (chinh sach)) - hanh tang luan dang cong san ((toan ban) or (toan cao))*.