Breaker Box problems
If you only have one breaker that feeds all of the outlets (plugs are the other end), then there is nothing simple that you can do, someone made that decision when your mobile home was built. In order to change it, an electrician would need to open up the walls and change the wiring, as well as add another breaker in your panel, which may or may not be possible.

Are you absolutely sure all of your outlets are on the same breaker though? A simple way to check is to plug in a radio, turn up the volume, and turn off the breaker. If it goes silent, then that outlet is tied to that breaker. If not, then turn off another breaker to see which one controls it. Do that for every outlet and create a map/list of what rooms are on what breakers. But it might be what you fear. In small mobile homes, they may have a very small breaker panel, so they have one 2 pole / 240V breaker for the Stove / oven, one 2 pole 240V for an Air Conditioner, one single pole 15 or 20A breaker for the kitchen outlets, and one 15A for the rest of the house outlets.