The cock-a-hoop Canaries clinched a famous 1-0 victory over United at Carrow Road last Saturday.
Scotland winger Snodgrass revealed: "We have taken massive confidence from that game. But it was only a matter of time before it all came together for us as a team. Now everything is in place and we honestly believe we can get a result anywhere.
"But that's what being a footballer is all about - believing in yourself and your team-mates."