finding good keywords for a game

hello can someone tell me please a good way to find a good keywords for my new game
i am using sensortower , appannie and asodesk but it seems they are giving wrong metrics , such as a keyword "round up" , the traffic in sensortower 2.0 and competition 9 but if you check that word in google play you will notice that some games with very few downloads and reviews is on the top
how can you be sure that a specific keyword has a real traffic ?
thanks

Can you post a link? Also is your app new? Does it have some downloads? It can take some take to rank it. Also recently Google Play had some issues with ranking apps as you can read in this thread: https://www.blackhatworld.com/seo/google-play-ranking.1168341/