[itsarnavb]

It's probably using Google custom search. I think that's the only way you can actually get Google search results as an API.

Perhaps custom search displays differing results?

[hayksaakian]

You can scrape google.com with a lot of awkward ban evading.

The fact that it works for non existing search results shows that it's ML

[usmannk]

See: https://news.ycombinator.com/item?id=17874276