Perhaps you should try some spelling variations:
nhanh lang » nhanh quang, nhanh thang, nhan dang
hieu lang » chieu sang, hieu quang, nhieu tang
trong van » trong cac
vat dung » van dung, va dung, viet dung
van toan » van tuan, van tan, van thanh
toan ban » van ban
ho hieu » ho chieu, hoi hieu, nho hieu

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 - nhanh lang ((vat dung) or (xay dung)) trong van toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - nhanh lang ((vat dung) OR (xay dung)) trong van toan ban*.