Not able to search multiple words in my newly developed app

Within my newly developed android app, I am not able to search on multiple words at once i.e. “what is” but I can search on single words i.e. “what”.
Note that the data source (Lexique Pro Application) allows for searching on multiple words at once.

Is there something obvious that I am missing during the dev stage of the app, or …?

Any assistance would be very much appreciated.

I can confirm that behaviour for my dictionary built from LIFT - neither in headwords nor in examples is it possible to search for phrases, and it doesn’t matter if you use disable “Match whole words” or not. It’s probably just not built into DAB yet, so it was good to post this as a feature request.

Thank you for the response, I was thinking the same thing but I have another app that allows searches by phrase so this is leading me to believe that it is something specific with the newly developed app. Thanks again