No, you cannot attach a graphics card to a laptop. Unless you use an external Graphics card and an external monitor it is completely impossible for the most part. I would not upgrade a laptop graphics card unless you are very experiences at taking it apart, and are perfectly happy to pay inflated prices (two or three times) the price for the graphics chips.
with that particular laptop you will probably never find an upgraded chip, and it will probably not be compatible with the laptop motherboard.
If you are interested in external Graphics cards they almost all have far worse performance than your current Graphics card has.