You need to increase your Google Play Reviews
However a new term has been coined called ASO or App Store Optimization related with this? Many new factors are influencing app store results following are few
App Name: Include a relevant key search phrase to your app name (e.g., Unblock me: [Puzzle game]). Tip: Apps starting by a letter closest to ‘A’ may also get better display.
App Publisher: Include keywords associated with publisher name (e.g., Zynga: [Social Games Services]).
Keywords and Description: Include keyword rich descriptions, meta descriptions text, images and video.
Installs: Track number of installs and uninstalls to learn why people do or don't like your app.
Ratings and Reviews: Ask for feedback and get reviews on websites, blogs, forums.