The Red Devils look to be back to their best following a rocky start to the new campaign, with Marouane Fellaini heading home the opener at Old Trafford this week before Juan Mata and Marcos Rojo combined to force in the second to cancel out Steven Nzonzi's first-half equaliser.
The result saw United climb to within one point of third-placed
Southampton, but according to Football411, Van Gaal is still expecting more from his side as
they enter the hectic festive schedule.
"In the first half we were not aggressive enough and also we
didn't keep out positions on the pitch so I wasn't pleased at
half-time," he told Sky Sports.
"I think the second half was much better. We created more chances - we scored, but we need to score more goals.
"You know that (Peter) Crouch is coming on and the long balls are
coming, but I'm very happy that we held this result until the end.
"The last few minutes were not necessary. We have struggled till
the end and in the Premier League it is common but I'm happy with the
result. It's our fourth victory in a row which is also important.
"I had to select a new line-up, but I don't want to talk about
the injuries. I want to talk about the players who gave us this result.
They fought until the end.
"I'm always impressed by our performance than by the result - I'm a very crazy coach. I want a better performance.
"Against Hull City I liked our performance, but today it could have been better."