Paul Lambert's side collected 10 points from their first four matches, but they have since lost three encounters on the trot to Arsenal, Chelsea and Manchester City without having scored a goal.
However, with a trip to Everton on the horizon, N'Zogbia has called upon the Villa players to remain "focused" in a bid to recapture their early season form.
"We had a really good start to the season. We did really well. Then we played against the big teams like Arsenal, Chelsea, Man City and Liverpool. It was a big challenge for us," he told the club's official website.
"We had a tough part of the season. Now we just have to stay focused on what is coming. We want to start again and make sure we bounce back. We have to remain focused on the season because it will be long."
N'Zogbia recently returned to action following a lengthy spell on the sidelines with an Achilles injury.