Searching in larger texts is sometimes tedious especially if you kind of remember the whereabouts. I guess most of us know that feeling on MacOS system preferences when you look for a particular setting. I always liked the way how search results are highlighted in System Preferences, e.g., “internet”.
Search in Scrivener is already very effective and offers fine-grained control. I use labels for POV and add metadata for locations and protagonists. The colour coding of the index cards already provide help in finding respective scenes.But I just wish sometimes I could see the results in context with the rest of the book and not just the matching scrivenings. (see my crude illustration of a search in the Scrivener tutorial.)