Perhaps you should try some spelling variations:
tieu sach » chieu sach, dien sach, te sach
trinh cua » trinh luat, trinh quan, trinh luan
cong cong » cong dong, trong cong, dung cong
tinh cua » sinh cua, tinh chat, tranh cua
cong san » cong tac
toan cau » toan cao, toan tap, toan tai
toan ban » van ban

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 - hanh ((trinh cua) OR (tinh cua)) cong cong san ((toan cau) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu sach - hanh ((trinh cua) OR (tinh cua)) cong cong san ((toan cau) or (toan ban))~".
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - hanh ((trinh cua) OR (tinh cua)) cong cong san ((toan cau) or (toan ban))*.