Need Help ESCO Tests

Hi! I've recently taken 3 escos that have to do with Comfort Cooling (A/C), The EPA 608, and one for the Heat Pumps. Only thing is, I failed them :/ and the quizlets my teachers provide never have the right material on them causing me to fail. If anyone would kindly help out with finding better quizlets for these exams, that would be so much appreciated!! Thank you!