Published application is not supported many devices

Hi Guys,

I have published my first application into play store and the problem is my application is not supported for many devices. I searched and found to add the Androidmanifest.xml into the project folder and I did the changes on API level for the application. After that my supported devices increase a little bit like 64 new devices added into the list. But still some of the devices is not showing (eg. Moto G (2nd Gen), Samsung Star Pro, Samsung Galaxy Note 3....) I have the link of the application if I go through the link it show the install button but if I go through the play store it says "Your Device is not compatible with this version". Please guys help me with this. I contact playstore developer site, but no response. I think the Androidmanifest.xml script needs more but I don't know what to do? (Sorry for my English, English is not my language).

Thanks, Prasanna K