Perhaps you should try some spelling variations:
chieu sang » chieu sach, hieu lang, nhieu tang
chieu xanh » chieu sach, chieu tinh, hieu manh
canh manh » lanh manh, canh tranh, cach mang
cua nhung » va nhung
manh cua » doanh cua, ban cua
cong dan » cong san, cong tan, huong dan
cong tac » cong ty

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sang) OR (chieu xanh)) - canh manh cua nhung ((cong dan) OR (cong tac)) van ban~".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) OR (chieu xanh)) - canh manh cua nhung ((cong dan) OR (cong tac)) van ban*.