Searching locations (geocoding) is never perfect. Google seems to be the best at it, though. Probably because they've put significant effort into doing that specifically and they simply have access to more data than any other organisation. OSM isn't about geocoding, it's about building a geographic database of the world. Geocoding is just one application and not one that seen a great deal of attention, relatively speaking. Personally I often use Google maps for geocoding if I have to but most of the time I already know where I'm going on the map so have no need for it.