Google has made a minor but useful change in its Photos app: now albums are also included in search results. Previously, photos contained in albums would show up in search results, but not the albums themselves. It's likely a server side switch - force quit and then restart the app to enable the feature. The functionality has been confirmed for Android (the latest app version is 2.2.1.136513178) and the Web - should be available on iOS as well. Via
Source: http://www.gsmarena.com/google_photos_now_also_shows_albums_in_search_results-news-21277.php