as I do a search engine that finds a div

I have the search engine of my website but only search in an address, example www.mipagina.com/search, I can not modify this ... I have a div that takes images and text inside, and I need to create a search engine that can I find it and show the content, how do I do it?

this is the code that I need you to find the search engine

<div class='contenedor'>
<div class='fondo'/>
<img class='app' src=''/>
<button class='vista'></button>
<div class='centrado'></div></div>