The Hammers were beaten in their opening match of the new Premier League campaign last Saturday with a 1-0 loss on home turf.
However, Vaz Te is confident that he and his teammates can get a positive result when they travel to Crystal Palace this weekend.
"We're going to go there with confidence. Obviously we know we can get a result there," he told the club's official website.
"It's going to be tough, of course it's going to be tough, but we believe in ourselves. I think we're a very good side and we've got plenty of players here capable of making the difference."
Vaz Te scored four goals in 10 appearances for West Ham during the 2013-14 campaign.