Inspired in this article: http://psi.wikia.com/wiki/Dual_Abilities
I wonder about if that's possible, in my experience, I have see no much clues on it.
It's common in Sci-fi that feature abilities' mix using them in awesome ways, and based in humans' creativity you could think there should be the same in real life, but in reality (at least the cases I know) not near.
There exists users with more than one ability, but not combinations, you can use them one after another, but it wouldn't make it another ability itself.
Anyways, I want to know all your opinions on this topic, so if you read this post please leave a comment below.