Real Madrid failed take opportunity to cut off points with Barcelona both teams have loss last games, still not change with points difference for both team and current standings Barcelona still managed with remaining 11 points.
You can only say this if Barcelona lose first then Real Madrid fail to win in order to reduce the gap. In reality, the opposite occured, Real Madrid lost first and Barcelona failed to expand the gap. Anyway if the gap is 8 points, chance for Real Madrid will be still very small.
Next games, Real madrid against Almeria are bottom standings team and Barcelona vs Real Betis, have good progress for Real Madrid winning next games because Almeria is not really favored team and another match hope Real Betis can get three points from Barcelona and have huge pressure for 8 points remaining.
Real Madrid will have a weaker opponent in a next match day compares to Barcelona. Real Betis are at the fifth position with 6 points less than Real Sociedad and they have big reason to try beating Barcelona and get three points. It will be a very big match for Real Betis as if they fail it, they will face with a risk to see the gap with Sociedad extending to 9 points which will be an ending for their top four dream.
La Liga has 7 games left and Real Madrid with little chance become the winner this season, but still any possibility if Barcelona fail on several games later although has little opportunity for getting loss.
7 matches and 11 points in their gap with Barcelona, chance for Real Madrid is like 1%.