Is it possible to get the list of documents where keys contain some 'substring' in web administrative console?

Hello,
I want to select only those doucments where keys contain some ‘substring’. I was succeded to do it with view function. The problem is that you need to rewrite view function each time you want to search by new ‘substring’. Is it possible do it in web administrative console: to input ‘substring’ and to get the result?

Not very easily. The best way to do this at the moment is probably via the elastic search plugin.