Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
cho chieu » ho chieu, theo chieu, chon chien
hanh dung » thanh dung, anh dung, hanh dong
luan kinh » xuan kinh, luat kinh, luan chinh
cong tinh » cong trinh, cong vinh, cong thanh
long tinh » trong tinh, luong tin, dong tin
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: cho chieu sach - hanh dung luan kinh ((cong tinh) or (long tinh)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cho chieu sach - hanh dung luan kinh ((cong tinh) OR (long tinh)) toan cau*.