Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
nhung cong » dung cong, thong cong, hang cong
thi chieu » thi chien, thi hieu, thi hien
mang cua » dung cua, ban cua, cong cua
manh cua » doanh cua, ban cua
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.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((thi chieu) OR (theo chieu)) xanh - anh ((mang cua) OR (manh cua)) nhung cong tac toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thi chieu) or (theo chieu)) xanh - anh ((mang cua) OR (manh cua)) nhung cong tac toan cau~".
• Adding a wildcard symbol may retrieve word variants: ((thi chieu) or (theo chieu)) xanh - anh ((mang cua) OR (manh cua)) nhung cong tac toan cau*.