City have seen Manchester United jump three points clear at the top of the table.
Silva told Voetbal International: "The manager has not specifically urged us to change our game, but I think we need to increase our self-confidence to feel freer and therefore play in a more attacking way.
"I must say that our manager has us exceptionally well prepared for every game.
"We are in second place and that means that he done a great job with the players. I think he does really good work."