[Plugin: Flickr Photo Post] Not finding photo by title

I love how this plugin is conceived but for now I am not able to use it.
I suppose it doesn’t sort photos by interestingness, so before finding a usable photo it takes much time.
I so tried to search Flickr and paste the photo title in the search field of the plugin.
Nothing is found, why?

https://www.ads-software.com/extend/plugins/flickr-photo-post/