On the screenshot below, I typed "San Francisco" in the search field and no results are found.
I can't see entirely what I typed because of the string "Aucune correspondance". If I made a mistake when typing I can't see it!
With the device in english the string is "0 matches" which is shorter.
But maybe we can put a string like "0/0" or "0 of 0". Some apps are doing like this, Google Chrome iOS as an example: