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, tuong tac, trong tan
vat dung » van dung, viet dung, mat duong
ho hieu » ho chieu, hoi hieu, nho hieu
va dung » van dung, va duong, va ung
tac van » tac vang, cac van, tac va

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 ((vat dung) OR (va dung)) trong tac van ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - hanh tran ((vat dung) OR (va dung)) trong tac van ban".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh tran ((vat dung) OR (va dung)) trong tac van ban*.