If you search "plague" using search menu on the top
you cant find plague.inc on PC game tabs
But the page exists, i could only visit that page via google search.
www.cheathappens.com/20174-PC-Plague-Inc-Evolved-trainer
Try scrolling up when you hit the search results page. Sometimes it auto-scrollls down for some reason. The most relevant results are at the top of the results page.