Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
nhanh tam » nhan tam, thanh tam, nhanh thai
trong tac » trong cac, tuong tac, trong tuc
trong tan » trong quan, trong cac, trong ca
hanh tam » thanh tam, hanh tram, hanh lam
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.

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - ((hanh tam) or (nhanh tam)) va dung ((trong tac) OR (trong tan)) van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - ((hanh tam) OR (nhanh tam)) va dung ((trong tac) OR (trong tan)) van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - ((hanh tam) or (nhanh tam)) va dung ((trong tac) OR (trong tan)) van ban".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - ((hanh tam) or (nhanh tam)) va dung ((trong tac) OR (trong tan)) van ban*.