This is definitely the time to take care of the problem. Your puppy is testing her limits at this time, and you need to let her know that when you want her to stop, she must stop. I would recommend starting obedience training now.
You can teach her to sit and lie down at this age, but the most important lesson you can teach her now is "leave it." If she is chewing on something, tell her "leave it" and replace the object she is chewing on with an acceptable substitute. I keep a bowl of chicken feet on top of my microwave, and when I want to stop a puppy from chewing on a shoe or some other forbidden object, I replace it with a delicious substitute. No puppy is going to growl when he knows that the alternative is so tasty.
Here is an article on how to train a puppy early. I start as soon as five weeks with my Pitbulls but only for 5 minutes at a time. Any longer than that is too much.
This article has a great video on how to teach leave it. It usually only takes one session to teach this, but you should practice it every day, and substitute what your dog leaves alone with some tasty treat, so that the lesson sticks with your cc even as she grows older.
Since this article is about teaching a puppy to be polite, take the time to read all of it and see what other ways you might train your cane corso.
If you have any other problems with her be sure to leave a question on one of those articles.