Will you stop talking rubbish? The bookies have no influence on the outcome of the match, in that Madrid are most likely to win because they are second in the league while Valencia are second from bottom. Full stop. And if Valencia win it will be a miracle (not in a religious sense), as sometimes happens in football.
Your conspiracy theory makes so little sense that you haven't stopped to think that the bookies win anyway, and that when matches are bought (or were bought in the old days when there was more cash) it's because there is something at stake, but here there is nothing.
Valencia has no chance in this game. The second bottom team against the second top team, there is no match here, all I see is a smooth three points well secured by Madrid with no stress or goal conceded. This s should be a total clean sheet for the away team but if Valencia wins then it means they were able to create chances and Madrid were lose to stop their advancement.