Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
cua nhung » va nhung
hieu xanh » chieu xanh, hieu manh, hieu nganh
anh mang » hanh mang, anh bang, anh nang
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.

• Performing a fuzzy search may retrieve terms with similar spellings: cao hieu xanh - ((anh mang) or (anh dang)) cua nhung cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cao hieu xanh - ((anh mang) OR (anh dang)) cua nhung cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: cao hieu xanh - ((anh mang) or (anh dang)) cua nhung cong tac toan cau*.