Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
luong cong » dung cong, trong cong, cong cong
hieu lang » hieu quang, nhieu tang, hieu van
cong dan » cong san, cong tan, huong dan
dan chan » dan gian, dan ca, van chat
chan dau » phan dau, han dau, chan doan

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: nha ((hieu lang) OR (chieu sang)) - anh ((nang doc) OR (nang luc)) luong cong dan chan dau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nha ((hieu lang) OR (chieu sang)) - anh ((nang doc) or (nang luc)) luong cong dan chan dau~".
• Adding a wildcard symbol may retrieve word variants: nha ((hieu lang) OR (chieu sang)) - anh ((nang doc) or (nang luc)) luong cong dan chan dau*.