Parts like? Off the bat I can tell you, nothing can be upgraded on it other than USB devices that can be added. THis does not include graphics cards.
Like can I add laptop memory, laptop add-on cards, internal ssd or something to help games run faster and the graphics card is amd radeon hd 7520g
You can add up to 8GB total of RAM, no laptop add-on slot is available and an SSD will not help you in gaming. That HD7520G is onboard graphics that is not meant for gaming and still shares system memory.
What is your budget?
What games do you play?