My golden retriever, is being sick almost everyday, she doesn't bring up any food it's a vibrant yellow coloured liquid, what ould be wrong?

That sounds like bile to me. I'd take her to a vet ASAP.

I agree, get to the vet. This could be serious. What Causes A Dog To Throw Up Bile Everyday? (http://www.blurtit.com/q220139.html)

Sometimes dogs throw up or have diohrrea (bad spelling) oops: after they have been running a lot (ie) flat out running. It could be diet, have you changed the brand or type of dog food recently or fed him scraps he does not normally get? Or he could be eating something without your knowledge. It may be worth mentioning to your vet. Hope this helped

I just went through a about of pancreatitis with my stepdaughter's dog. Your dog needs to be checked by a Vet.

If it has just been over the course of a couple of days I wouldn't worry too much, dogs have off days just as people do.
Mine will occasionally get an upset stomach and throw up bile and grass for a few days.

If it has lasted more than 2 days then I echo the other responses in saying consult your vet, there are other more serious problems that can happen.