Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
hanh tang » hanh trang, anh tang, hanh mang
tang cua » mang cua, hang cua, tang luan
cua dang » cua cong, cua ban
cong tan » cong thanh, cong ty, cong ha
cong tac » cong ty
tran van » luan van

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

• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - hanh tang cua dang ((((cong tan) OR (cong san))) OR (cong tac)) tran van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - hanh tang cua dang ((((cong tan) OR (cong san))) or (cong tac)) tran van~".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - hanh tang cua dang ((((cong tan) OR (cong san))) or (cong tac)) tran van*.