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
qua dung » quang dung, su dung, qua song
cong tac » cong ty
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.

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (theo chu)) sach - ((canh manh) or (canh tranh)) qua dung cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (theo chu)) sach - ((canh manh) OR (canh tranh)) qua dung cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (theo chu)) sach - ((canh manh) or (canh tranh)) qua dung cong tac toan cau*.