Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
doanh cua » doanh luan
dong cong » duong cong, dung cong, dang cong
cua dong » chua dong, cua cong, cua dang
van tuan » van ban, anh tuan
van quan » van ban

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: ho ((chieu xanh) OR (chieu sang)) - toan doanh cua dong cong ((van tuan) OR (van quan)) cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu xanh) or (chieu sang)) - toan doanh cua dong cong ((van tuan) OR (van quan)) cao~".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu xanh) or (chieu sang)) - toan doanh cua dong cong ((van tuan) OR (van quan)) cao*.