Read "Stubborn Fat Solution" by Lyle McDonald.
Spot reduction is not possible, but lower abdomen area is a stubborn fat area for males that can take some special work. "Stubborn Fat Solution" doesn't go into diet, but it covers the physiology behind fat loss and stubborn fat loss in general. It goes over the cardio and supplementation protocols to get rid of stubborn fat.
You may also benefit from learning how to implement refeeds. There should be plenty of info on his site about that. He has written a lot of articles.