So, you have taken the time out to email a list of your favorite schools and a coach is not being responsive. Unfortunately, coaches tend to get busy with multiple responsibilities throughout the year. Here are a couple things to consider:
Try to focus on emailing coaches in the Spring. January through the summer is what many coaches use as a recruiting period. College showcases are a great place to invite a coach because they will be able to see multiple players at an event. Some coaches simply do not have the budget to be able to go to see only one player.
Coaches need direct information in order to know if you are a player worth pursuing. They are not looking for a long email detailing how much you love soccer. They want good, concise information that matters before they come out to watch you play.