If search results no results -> Show featured coupons below

Hi all,

I would like to know how to show some coupons or a slider with featured coupons below the search results if there are no results e.g. 0 coupons match your search term.

I notice that a lot of visitors search for specific products or brands that I don’t have at the moment and I would like to push them in a direction / category or at least show them some featured coupons.

Which file should I edit? and what solution do you suggest?

Thank you very much in advance!

My site is https://voucheralarm.com