Ever heard of It's a very different survey service that provides keyword info from the survey responses, among other things.
They offer a $1.00USD 21 day trial to give them a good checking out.
It was worth a cup of coffee to me, and you can back out within those 21 days if it's not worthwhile for you.
I'll admit that's my affiliate link, but they're not paying me for the trials. Just watch your calendar!!