Perhaps you should try some spelling variations:
tieu sach » chieu sach, dien sach, te sach
cua nhung » va nhung
anh tang » anh bang, anh dang, anh nang
tang cua » mang cua, hang cua, tang luan
cong dan » cong tan, cong dong, cong tac
cong san » cong tac
toan cau » 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: theo tieu sach - anh tang cua nhung ((((cong dan) OR (cong san))) OR (huong dan)) toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu sach - anh tang cua nhung ((((cong dan) OR (cong san))) or (huong dan)) toan cau~".
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - anh tang cua nhung ((((cong dan) OR (cong san))) or (huong dan)) toan cau*.