You should need not to add more websites or associate your Google AdSense account to more websites. This is recommended that you should associate the existing Google AdSense account to India Study Channel and its sister concerned websites like IndiaReviewChannel.com etc.
Adding more websites will not increase your revenue through Google AdSense. You should need to do efforts to post good self written articles and other hard work to earn revenue. If you link other websites with you account and in future the website contain any information that the Google AdSense do not allow. Then this can be very harmful for your Google AdSense account. Also note that our Google AdSense account is very sensitive and they can end our account at any time with little mistake without giving any reason. So always relay on India Study Channel and sister websites only.