Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, nhieu tang
nhung cong » dung cong, thong cong, hang cong
hieu lang » hieu quang, nhieu tang, hieu van
hanh hinh » hanh chinh, hanh tinh, hanh dinh
cua nhung » va nhung
hinh cua » chinh cua, sinh cua, tinh cua
cong dan » cong san, cong tan, huong dan
gian man » gian dan, gian lan, gian van

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 (((hieu lang) OR (chieu sang)))) - hanh hinh cua nhung cong dan gian man~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (((hieu lang) OR (chieu sang)))) - hanh hinh cua nhung cong dan gian man~".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (((hieu lang) OR (chieu sang)))) - hanh hinh cua nhung cong dan gian man*.