Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
hanh tran » hanh trang, thanh tran, hanh tram
trong tac » trong cac, trong tan, trong tuc
tuong tac » cong tac, luong tai, tuong lai
ho hieu » ho chieu, hoi hieu, nho hieu
tran va » tran van, trang va, tranh va
va dung » van dung, va duong, vat dung

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - hanh 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 va dung ((trong tac) OR (tuong tac)) van ban".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh tran va dung ((trong tac) OR (tuong tac)) van ban*.