Adding SLI too Lenovo Y510P?

I have a Lenovo Y510P with a 2GB GT755M Graphics Card. I want to know if there's a way to add the second graphic cards, I don't exactly know what its called SLI or what ever to make it 4 GB…

Laptop graphics cards aren't made to be SLI, they are a chip placed within the motherboard and takes precise soldering and wiring, if your talking about RAM that's a different case, you can buy RAM to replace the current one