Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
hanh dung » thanh dung, anh dung, hanh dong
cong cong » cong dong, dung cong, dang cong
chao chu » cho chu, cua chu, cao cho
dung cua » dung luan, dung cho
tac toan » tap toan, tam toan, hach toan
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 chieu) OR (chao chu)) sach - hanh dung cua ((cong cong) OR (trong cong)) tac toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (chao chu)) sach - hanh dung cua ((cong cong) OR (trong cong)) tac toan cau~".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (chao chu)) sach - hanh dung cua ((cong cong) OR (trong cong)) tac toan cau*.