Well of course we can’t find everything. That presumes some perfect world where everything in people’s brains is teleported into computers suitable for searching remotely.

Have you ever thought about just asking a human being instead of doing all of this searching? The searches are failing because the people have an imperfect understanding of the systems. Someone else’s search might be better, and someone else might just know something with their experience and their brains instead of having to type something in and trust whatever comes back as truth.