How to change “No results”?

Hi,

I am working with AP v3 and Askbug. I am trying to adapt the content displayed when a search leads to no-results. I have tried by adapting :

-search.php

-no-result.php

But it didnt work, even after cleaning server and browser caches.

By the way, no-result.php doesnt seem to be called (text and searchform are not displayed)

Could anyone tell me what am doing wrong and how to make it right?

Many thanks in advance!