Existing HN hiring threads start with:
> "Please lead with the location of the position and include the keywords INTERN, REMOTE, or VISA if the corresponding sort of candidate is welcome."
Searching for "intern" matches postings with "internet", "international", etc. I've seen comments suggesting that a search for "remote" matches "no remote".
Here's a quick fix that uses a prefix, for consideration:
> "Please lead with the location of the position and include the keywords +INTERN, +REMOTE, or +VISA if..."