Search Box Within a existing html box... help needed!

I am creating a dropshipping website with wix to work with shopify. My store, with all my products and the checkout is made by shopify. they provide the html and i just load it into an html box. the problem is all search bar tutorials search the subsections or pages of my website. I need a search bar (html search bar) that will search within the products in my store section.

Anyone know how to do this?