Can't find where to change text for store page

This link for example:

https://www.walletperk.com/store/finish-line/

Doesn’t currently have coupons. So it has this text:

There were no results found for your search query.

We did not find any results for your search query. Please try again with a different search query.

I tried to change it by going to Language Setup > Gallery Page (index.php) and it did not work.

Am I at the wrong section ?