What are you asking God in your prayers? 1 John 5:14 tells us And this is the confidence* that we have toward him,that no matter what we ask according to his will, he hears us.
God does not answer requests that go against his will, or his requirements, which are in the Bible. Do you know what his will is ,or what his requirements are, if not pick up your bible and find out. Then when you pray you will see how he truly answers prayers