Perhaps you should try some spelling variations:
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
doanh han » doanh nhan, doanh hoan, doanh phan
ban cong » bang cong, van cong, phan cong
cong dan » cong san, cong tan, huong dan
han cua » hang cua, nhan cua, than cua
dan thi » dang thi, tran thi, dinh thi
thi cao » thai cao, thi hao, thi bao

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: doi ((chieu sang) OR (chieu sach)) - doanh han cua ban cong dan thi cao~.
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sang) or (chieu sach)) - doanh han cua ban cong dan thi cao*.