United were on top for large parts of the game, but the Blues clinched a 1-0 win thanks to an Eden Hazard strike.
Though United saw their six-game winning streak come to an end, Van Gaal was happy to take positives out of their display.
Normally we are not so creative and because of that I think we played a fantastic match but we lose
Louis van Gaal
"Normally, we are more effective," Van Gaal told BBC Sport.
"Normally we are not so creative and because of that I think we played a fantastic match but we lose, and now I have very disappointed players and I am very disappointed.
GETTY
Louis van Gaal was impressed with Manchester United's display
"But I see that we are improving every week and when you can play in Chelsea like this, as the dominant team, then I am very happy with that, but I am very disappointed and that's the ambivalence in my feelings."
The Red Devils remain in third spot in the Premier League, trailing table toppers Chelsea by 11 points.
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