I do everything necessary to get a flat stomach (cardio and strength training 3-4 times wk and crunches) and i eat healthy. when can i see results?

Can't say: For flatter abdomen eat healthy & get physically active. Calories burned > calories consumed. To tighten ab's: crunches, reverse crunches, exercise ball crunches, pelvic thrusts, lying leg raises, side bridge & “bicycling” exercise on back. Engage in regular aerobic exercise (i.e. running, swimming, Nordic track, bicycling, kickboxing, walking, cross country skiing, hiking, etc.) No spot fat loss.