Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh tung » thanh tung, manh tung, hanh dung
chu xanh » chu manh, chua xang, chuc danh
anh dang » anh dong, anh dung, anh 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: cho ((chu xanh) OR (chieu xanh)) - ((hanh tung) OR (anh dang)) va nhung cong tac toan cau~.
• Adding a wildcard symbol may retrieve word variants: cho ((chu xanh) or (chieu xanh)) - ((hanh tung) or (anh dang)) va nhung cong tac toan cau*.