For example when i'm playing minecraft i'm walking using w+a and then I jump and I can't
Added (1). really that is just stupid I need something to change my entire keyboard so I can press more than 2 keys at a time
Added (2). thats gonna be annoying because I have a laptop and what's the point of having an external keyboard
Try pressing w. Hold it for awhile and press a. Well i know "w" is forward. And "a" is like for left. If i'm not mistaken.
This is a hardware limitation of your keyboard. Unfortunately, the only solution is that you must purchase a better keyboard that does not have this limitation.
I think you should change you keyword.
You can simultaneously hold multiple keys like Ctrl+Alt+Del.