@tungphong, Been looking at this puzzle for 20 minutes now. Then after looking at @stayoutoftherz deflection idea. Now I see d forceful deflection!

1. Bc7!!
   That deflection wins!
   I have a game similar to this but this one is incredible!

If 1.Qxc7 2.Rxc5+
Then after 2.Qxc5 3.Qb7 leads to mate.

Also the deflection works after black replies with 1.Rxc7 but this time white plays 2.Qb7+ first forcing 2.Rxb7

Then 3.Rxc5 checkmate!