Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chua xang » chua nang, chuc nang, chu bang
hanh tang » hanh trang, anh tang, hanh mang
cua trong » cua truong, cua trung, qua trong
tang cua » mang cua, hang cua, tang luan
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan cao » toan ban, toan tap

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: cho ((chua xang) OR (chieu sach)) - hanh tang cua trong ((cong dan) OR (cong san)) toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "cho ((chua xang) or (chieu sach)) - hanh tang cua trong ((cong dan) OR (cong san)) toan cao~".
• Adding a wildcard symbol may retrieve word variants: cho ((chua xang) or (chieu sach)) - hanh tang cua trong ((cong dan) OR (cong san)) toan cao*.