Perhaps you should try some spelling variations:
thanh tran » thanh trang, thanh toan, thanh tra
hieu lang » chieu sang, hieu quang, nhieu tang
hanh tran » hanh trang, hanh tram, thanh trang
trong tac » trong cac, trong tan, trong tuc
tuong tac » cong tac, luong tai, tuong lai
ho hieu » ho chieu, hoi hieu, nho hieu
va dung » van dung, va duong, vat 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: ho hieu lang - ((hanh tran) OR (thanh tran)) va dung ((trong tac) OR (tuong tac)) van ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - ((hanh tran) OR (thanh tran)) va dung ((trong tac) or (tuong tac)) van ban~".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - ((hanh tran) OR (thanh tran)) va dung ((trong tac) or (tuong tac)) van ban*.