Yes, it does exactly that. If you check "Web" on the left sidebar, and uncheck "Stories" it will find the posts where "friendship" occurs in the linked web pages. But we still show the title of the original hacker news story in the search result and highlight the search term if it ALSO occurs in the title.

If you scroll long enough within the search results you will finally reach results where the search term is not in the title, but only within the linked web page.

It is more obvious if you search for queries which are less popular than "friendship"

You have to check box "Web" for it to search in linked articles too. Without that it highlights the words in articles that are found only because of title. And the indexing of contents isn't perfect, sometimes it seems to work for main article content but not for article author name even when it's shown.

I think it is supposed to be doing that?