I need some advice on dogs barking issues

If they are inside dogs try playing music cd's, that will stop ability of them to hear outside noises that might set them off. Try spraying them with water from a spray container and saying "quiet" firmly. Outside a hose would work. Not to soak them, but to get their attention. The last resort is using muzzles, that allow them to drink water, but not bark. Usually, the above measures work if you keep it up and don't let them get away from not listening to you.