Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu xanh » chieu sach, chieu sang, chieu tinh
nhung cong » dung cong, thong cong, hang cong
cua nhung » va nhung
anh tang » anh dang, anh nang, anh sang
anh bang » anh hoang, anh quang, tinh bang
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: theo chieu xanh - ((((anh tang) OR (anh bang))) OR (sach dung)) cua nhung cong tac toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu xanh - ((((anh tang) OR (anh bang))) or (sach dung)) cua nhung cong tac toan cau~".
• Adding a wildcard symbol may retrieve word variants: theo chieu xanh - ((((anh tang) OR (anh bang))) or (sach dung)) cua nhung cong tac toan cau*.