Yes, this shot can be tricky. It seems like it should be easy but it does create some problems.
The biggest mistake I see is that people tend to lean into the hill and then chunk the club into the ground.
What you want to try and do is level your shoulders to the slope of the hill. This will put more weight onto your trail foot. From there try and swing the club more level to the hill/terrain.
Additionally play the ball back in your stance a little bit because by tilting back you are moving your swing center back as well. Also, you can take a little less lofted club because you already have loft built into the hill/slope. If not the shot has a tendency to fly to high and come up short of your target.