https://hn.algolia.com/ only searches the text content of the submitted stories (as in the title and url) and the comments.
It doesn't index the actual article content nor take into account links across sites and content like Google does. Algolia (as self-described) is designed to search for things (like products in a ecommerce store) rather than text with concepts, relations, and entities in a knowledge graph like Google.
Maybe too late now, but i would like to point that I went to read Elasticsearch, Algolia, and Xapialand product descriptions before I made my comment, so I know well what Algolia is for, and in the example I gave, I was searching for a Headline, not for internal content inside the comments, and It was a headline that was in the first page of results at HN on that moment, so, I think I have phrased my comment in a polite way towards Algolia, understanding that search has more moving parts then the pattern matching algorithms of the logical core.
:ps I am sincerely grateful for the information you gave in your comment, about Entities, Concepts and Relations on a Knowledge graph. This is exactly the kind of info I was looking for when I made the comment, so It was enlighting to know that, and thank you again.
It doesn't index the actual article content nor take into account links across sites and content like Google does. Algolia (as self-described) is designed to search for things (like products in a ecommerce store) rather than text with concepts, relations, and entities in a knowledge graph like Google.