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