i like to have a very good leadership over my dog !! and i would like when i tell him something to do it ...
You can get this. Dogs, being opportunists, scavengers, hunters do what works. Instead of some training methods where people enforce commands by intimidation, bullying, trying to out strength and have power struggles with their dogs, what works best is by making sure there's something in it for the dog. Make everything you want him to do worthwhile to him. This is why positive reinforcement methods work so well. Now, you don't want to bribe, but instead reward after a command is obeyed. There's a difference between bribery and reward. You can use a treat to lure a dog into many positions; sit, down etc. But don't give it to him until he gets into the position.
For any behavior to be repeated, there needs to be a payoff. If you want a behavior to go away, something you don't like, don't give a payoff. Or....let him get his own payoff. Sometimes a behavior in and of itself IS the payoff or the dog is self rewarding. Watch for that. You gotta be on your toes. LOL.
When you want your dog to come to you, entice him...run the other way, make like a game. And ONLY when he is definitely coming to you, almost there, do you use the word, "come." Then you praise like crazy and give a treat. Never scold a dog when it comes to you, no matter what he might have done before. Dogs live in the moment and the last behavior they did is what's on their minds but only for a few seconds. The reward needs to come within 4 seconds. If you avoid ending the fun when you call your dog inside, he'll be more apt to comply. Have a little more fun when you come in. Avoid doing things to the dog that he doesn't like after you call him, like cutting nails or cleaning ears. Go to him to do those things.
Always follow through and make sure every command is enforced. That's where a lot of people get into trouble. They think..."Oh well, I'll let it go this time." That's when the dog learns that he doesn't have to obey. You don't have to punish or scold when he doesn't obey. You have to go to him, if it means getting up off the couch and show him what you want without anger. Then praise when he complies. If you don't like a behavior he's doing, distract, redirect him to an alternate behavior and praise for that.
Anyhow, hope some of that helps.