Perhaps you should try some spelling variations:
canh manh » lanh manh, cach mang, van manh
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, doi chieu
theo chu » theo chieu, cho chu, chao chu
cua dung » cua dang, cua dong, qua dung
cong tam » cong tac, cong tan, cong nam
tam toan » tap toan, tam than, pham toan
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: ((ho chieu) OR (theo chu)) sach - ((canh manh) OR (canh tranh)) cua dung cong tam toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (theo chu)) sach - ((canh manh) OR (canh tranh)) cua dung cong tam toan cao~".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (theo chu)) sach - ((canh manh) OR (canh tranh)) cua dung cong tam toan cao*.