It can happen that an address is not found, although the location is correctly marked on the map and also labeled. This is usually due to an incomplete or incorrectly recorded database entry in one of our sources. In this case, try to keep the search query more general.
For our search function, we use data from OpenStreetMap, Geonames, Natural Earth, OpenGeoCode, Postcodes.io and numerous other sources. The database is continuously growing, and thus the search results are also continuously improving.