any good music for study?

Lofi music is in my opinion the most suitable for studying, as the calm melody and the absence (almost always) of speech allows you to focus more on what you are studying.
If you want to listen to it together with thousands of other users on YouTube just search for "lofi hip hop radio" and the first result should be of ChilledCow with a 24/7 stream.

Otherwise if you are looking for a particular lofi artist I recommend Nujabes :)