General Recipe Trouble Shooting

Hi all, I've tried at least 35 different recipes, often times repeatedly, to get a good consistency in my pizza crust with no luck. Although I've managed to make some tasty ones, the crust never achieves the level of "chewiness" I'm looking for. I've tried various flours to have a high gluten content, I've even tried adding vital wheat gluten to the mix. I've tried kneading the dough 2-3 times longer than recommended, and using both slow and fast rise methods, none of which seem to help. Any ideas on what's up with my dough?