I noticed the recommendations to use Google to search for stolen stories.
As someone who has used the search engines for close to eighteen years I've found Google results are circling the toilet rim and headed for a flush the last two years. I often do thousands of searches/day (software)
4 unique lines out of one of my stories (posted 6 months) completely failed on Google, but Bing nailed the story as first result 4/4. That's in line with the results I've been seeing for the last couple of years.
Even a change is search parameters pulls up the same Google results that just got rejected. Strange because Google measures that and shouldn't be posting them again.
I'd highly recommend adding Bing into your searches if you're looking for stolen stories. It's just a little more effort.