The search results are bad. I searched for “front door” and “door handle” and I received a lot of random results for fireplaces, cabinetry, vanities, etc. I understand that these results may have “front” and “door” in their description, but the search has to be more intuitive to return common sense results for a search term. Also, the Collections tab has quite a few results with zero models. These should be removed by the SketchUp team. 3D Warehouse could be a valuable resource, but it currently takes forever to find anything useful.
Have you tried Reverse Image Search?