cant click some keys in the same time with my laptop

I cant press these and of these in the same time (W,A,S,D) other keys work fine each other examples:
when I hold W, D or A wont work.
when I hold S, D or A wont work.
and vise versa, BUT when i hold W or S with other keys they work expect D and A, This problem has just happened today I've been using this lap for 2 years '