Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, nhieu tang
luong cong » dung cong, trong cong, cong cong
hieu lang » hieu quang, nhieu tang, hieu van
trung cap » truong cao, trung tam
cap luong » cat luong, cao luong, chat luong
cong tac » cong ty
hanh cat » hanh cham, hanh luat, nhanh cay
hanh cac » hang cac, hanh cham, nhanh cay

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 (hieu lang)) - thanh trung cap luong cong tac ((hanh cat) OR (hanh cac))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sang) or (hieu lang)) - thanh trung cap luong cong tac ((hanh cat) OR (hanh cac))~".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sang) or (hieu lang)) - thanh trung cap luong cong tac ((hanh cat) OR (hanh cac))*.