Updating windows Search on server 2012R2

Hi Experts,

I'm trying to find information about the process of updating the Windows Search and indexing service on one of the servers that we own.
I have a server 2012 R2 (Version 6.3 Build 9600) with Windows search and indexing Version 7.00.9600.19170.

I was wondering how can I see a version matrix (Meaning which versions of Windows search supprts which OSs) and how can I update the current version to the newest one available (Assuming the one I'm running isn't it)