Can boats sail faster then the wind?

yes they can

They make their own wind.

The true wind starts the boat moving forwards, as the boat moves forwards it effectively makes wind that appears to be coming from directly ahead, called induced wind. These two winds (true and induced) combine to form apparent wind, as this is the combination of the two winds it is usually stronger stronger, therefore the boat is now sailing in more wind than the true wind and can therefore sail faster than it.