I can relate to the phenomenon. They are extremely frustrating. Somedays it seems like it's going to be a hollow day, but I eat some healthy food and I end up feeling full. Somedays healthy food just is not cutting it. So I have a little of whatever junk food I'm craving and that does it. I'm full.
But there are other days nothing does it. It doesn't matter how much of what I eat, I don't feel even slightly satiated.
I try to deal with them by walking a fine line between healthy and junk food and not blowing my diet too much.
I guess that's all I can do.