Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh doanh » hang doanh, chinh doanh, doanh doanh
nhung cong » dung cong, thong cong, hang cong
hien xanh » hien hanh, hien nhanh, hien khanh
doanh cua » doanh luan
cua nhung » va nhung
dan toan » van toan, manh toan, xuan toan
dan than » dan chan, ban than, van than

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: hoc ((hien xanh) OR (chieu xanh)) - hanh doanh cua nhung cong ((dan toan) OR (dan than)) cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) or (chieu xanh)) - hanh doanh cua nhung cong ((dan toan) OR (dan than)) cao~".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (chieu xanh)) - hanh doanh cua nhung cong ((dan toan) OR (dan than)) cao*.