I was gonna say what (I think, I only read the first sentence he wrote) MANUMAD has said. Play more agressively, get in their faces, keep them playing in their own half and keep getting the ball. After having a fantastic season with Bilbao, my current season (3rd season) has been pretty awful, and i struggled to get results.
It just seemed like things wouldn't go right for me, despite the fact I trust in my tactics which I have used alot. So I went for a approach I very rarely used and set up my team to simply win the ball back ASAP, take them out if they get past my forward 6 players and get the ball forward as fast as possible. Finally the results are turning round, and I am climbing the league again (Gone from 8th to 3rd in 2 matches, and from 12 points off 1st place Barca to just 2.