Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
hanh hang » thanh hang, hang hang, hanh han
cong danh » cuong danh, cong thanh, cong khanh
cong dan » cong san, cong tan, huong dan
va tong » va thong, va tuong, va trong
tuan cu » tuan tu, quan cua, tuan thu

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 ((chieu xanh) OR (chieu sang)) - hanh hang va tong ((cong danh) OR (cong dan)) tuan cu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (chieu sang)) - hanh hang va tong ((cong danh) OR (cong dan)) tuan cu~".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (chieu sang)) - hanh hang va tong ((cong danh) OR (cong dan)) tuan cu*.