If your dog is not obeying a command because he does not understand it, it is not a behavioral problem. All you need is to spend more time to train your dog so that he will understand your commands. However, if your dog is deliberately not obeying your commands when he was already well trained, then that is a true disobedience.
This can be a dangerous problem for a disobedient dog. For example, if your dog is rushing towards the road and he does not obey you when you are saying "come", this may end up in a fatal accident. Normally, a disobedient dog will not respect your authority and you have to do something to regain your authority. You will need to show who is the owner at home or outside.
Here are some disobedient dog training tips. Now, the first thing that you need to deal this disobedience behavior is to reestablish your dominance. Always remember, when you are leaving the house together with your dog, you have to exit the house first. If you are boarding the car, you have to be the one to board first too. Tell your dog to wait first while you go ahead and only say "ok" when you are done.
Another disobedient dog training tips to reestablish your dominance to make your dog wait for the food. Be sure to eat before your dog. Most of the dogs will get excited or some will even get jumpy when you are holding on to his food. Make your dog sit and wait until you release him to eat.
Another disobedient dog training tips is to restrict your dog from going to certain areas of the home, such as your bed or even sofas. This is a way of showing the level of difference between you and the dog.
Another disobedient dog training tips to make sure that your dog will listen to you in future is to never allow your dog to initiate any games. If your dog is nudging you for your attention to start the game, you have to learn how to ignore him. You may find your dog doing this cute, but if you are going to start the game with him, he may think that he is the owner instead.
The most effective way to solve this disobedience problem to start a basic dog obedience training again. You can try to leash train again and if your dog is ignoring, you should give him a short and sharp tug (some call it a 'flick') on the lead to remind him that you are present and you are the one in charge.