What is a good way to get rid of dog puke stains and gatorade stains?

my son left a bottle of gatorade on the table we the house and when we came back it was all over the floor. so now i have a stain on my carpet i tryed alcohol peroxide and kids n pets i even had citrus solution come out and all it did was lighten up. a few weeks later my dog vomits on the carpet. please tell me how to get them out, if i cant should i dye my carpet or just give up!