As far as I know, the only way to refine a search on Pinterest is to go back to the search window and add words. If you look at this search that I did, you will see that the Lori Smith quilts come up first. The search engine looks for the best matches first, then adds in anything that even partially matches.
https://www.pinterest.com/search/pin...D=hand%7Ctyped
I think the same is true on Google images. The closest matches to your search words will be shown first.
As far as I can tell, there are not many images of this quilt online.