Show Products in Blocks By Keywords

I didn't investigate much about new version of cs-cart but i want to know is there any current feature if we create a block product by keywords like if someone viewing product “Apple IPhone 5 16GB” and the manually created block will shows the other “Apple IPhone 5 32,64GB” products too. I hope you guys understand. As far as i know in previous version we can able to manually add “Related Products” but not by keywords ?