Query idea: A not-so-obvious usage of tags - find shared tags

Hi, I tend to tag my notes a lot, so I can find notes, which share tags, but aren't so obviously connected to each other. This way I hope to finde new connections between ideas.

So my request would be a query, where I would get as a result notes, which are not connected by links and backlinks (or by collections, or any other way), but share two, three or more tags. What I mean is not "find a note, that has the same tag/tags as the note I'm working on", but rather "search the database for notes, which share tags, but are not connected in any other way".

Another way to do this would be searching for such connections on the graph, but the problem is, if there are many tags, the graph becomes a mass and is rather useless for such purposes.