If you'd run this search ysterday then you would have seen a spam site getting 5.5 billion results in Google. Today, it was down to only 2.1 billion, when I tried it. Click a few results, however, and you'll see it's pure spam.
Google is riddled with this sort of rubbish, at least for some searches, and Monetize gives some idea how it's done (though things have changed several times since it was written).
Check out this site: search of eiqz2q.org -- depending which datacentre you hit, you will see between 3.8 and 5.5 BILLION RESULTS. Even worse... the domain is EIGHTEEN DAYS OLD. That's right, in under 3 weeks, one person has managed to get one domain 5 billion pages indexed in Google. And they are ranking, too. That particular domain has an Alexa ranking of under 7,000. Another domain owned by the same person, t1ps2see.com, has between 1.7 and 2.4 billion indexed pages and an Alexa ranking of under 2,000... after 4 weeks. Coincidentally, the sites also have 3 blocks of Adsense ads on each page. I wonder how much that one person is earning per day with billions and billions of pages indexed and ranking?
They are not real pages, of course: this is spam generated on the fly. But they certainly look like clickable results.
For the record, it's now three years since I complained to Google's Craig Silverstein about this sort of junk result, and got a more-or-less blank look. And the problem is getting worse, as anyone who ventures beyond the first three hits must have noticed.
Why is it too hard for a company with a zillion PhDs to notice? Don't Google employees use their own search engine?