Perhaps you should try some spelling variations:
cuong sach » duong sach, cuon sach, cong sach
hanh trung » thanh trung, hanh trang, manh trung
dai cuong » tai cong
trung va » truong va, trang va, trung ha
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan cau » toan cao, toan tap, toan tai
toan ban » van ban
va hang » van hang, va nang, va lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: dai cuong sach - hanh trung va hang ((cong dan) or (cong san)) ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: dai cuong sach - hanh trung va hang ((cong dan) OR (cong san)) ((toan cau) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: dai cuong sach - hanh trung va hang ((cong dan) or (cong san)) ((toan cau) or (toan ban))*.