Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
theo chieu » theo tieu, ho chieu, thi chieu
hang mang » hang hang, hanh mang, hoang manh
hang mong » hang nong, hang cong, mang mong
cua nhung » va nhung
theo chu » cho chu, chao chu, theo yeu
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan tap » toan ban

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 (theo chu)) sang - ((hang mang) OR (hang mong)) cua nhung cong tac toan tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) OR (theo chu)) sang - ((hang mang) or (hang mong)) cua nhung cong tac toan tap~".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) OR (theo chu)) sang - ((hang mang) or (hang mong)) cua nhung cong tac toan tap*.