Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hien hanh » dieu hanh
tranh cua » manh cua
doanh cua » doanh luan
dong cong » duong cong, dung cong, dang cong
cong tan » cong tac, cong san, cong thanh
tan doan » tran doan, tap doan, van doan
doan cao » doanh cao, toan cao, doan cap

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