Perhaps you should try some spelling variations:
hanh trong » hanh trang, anh trong, hinh trong
chieu sang » chieu sach, chieu xanh, nhieu tang
thanh tran » thanh trang, thanh toan, thanh tuan
hieu lang » hieu quang, nhieu tang, hieu van
trong thi » trong thoi, trong thu, trong tho
dang cong » dung cong
thanh tra » thanh toan, thanh hoa
thi dang » thi nang, thi hang, thi dung

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 sang) OR (hieu lang)) - hanh trong thi dang cong ((thanh tran) OR (thanh tra)) van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sang) or (hieu lang)) - hanh trong thi dang cong ((thanh tran) OR (thanh tra)) van~".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) or (hieu lang)) - hanh trong thi dang cong ((thanh tran) OR (thanh tra)) van*.