I'm not sure you can really ask "How do I get a strong position against ___ opening" given that sound openings are really just a means to get to a playable middlegame with equality at worst and a slight advantage as best.
Now If you happen to know the theory and ideas of these positions/structures better than your opponent, you are statistically less likely to go wrong in the opening and give him an advantage. However, with best play on both sides, you don't magically get into a "strong position".
If this were not true, every GM in the world would be playing White vs. the Caro using the "Strong position" variation. Of course => Within days/weeks of this novelty, no GM would be playing the Caro as black ... which we know is "NOT" the case today :)
If you meant to ask "how do I aggressively go after the Caro", that's a different question. Here are a few that I've tried.
1) There's the Panov attack in the Exchange which is aggressive + very useful in learning how to play with an isolated Queen pawn, something every player should know.
2) There's the Mieses gambit (1.e4 c6 2.d4 d5 3.Be3) if you really have the stomach for it.
i am not really sure how to get a strong position after the caro kahn. I play aggressive openings such as the max-Lange attack, najdorf, slav, and giuoco piano