Could more miraculous works bring more persons to faith? There are those who say that if they saw the miracles that happens in the time of Moses, or the disciples they would surely have faith.

What are the Biblical reasons for miracle? Is it to create faith?
Preface: this is a generalization.  Atheists, like Christians, can't simply be lumped into a group where all of them think, act, react, and believe the same way.  



I don't believe so.  In the words of Jesus Himself,in Matthew 16:1-4 (KJV)


  1 The Pharisees also with the Sadducees came, and tempting desired
  him that he would shew them a sign from heaven.  2 He answered and
  said unto them, When it is evening, ye say, It will be fair weather:
  for the sky is red.  3 And in the morning, It will be foul weather to
  day: for the sky is red and lowring. O ye hypocrites, ye can discern
  the face of the sky; but can ye not discern the signs of the times?  4
  A wicked and adulterous generation seeketh after a sign; and there
  shall no sign be given unto it, but the sign of the prophet Jonas. And
  he left them, and departed.


In this case, Jesus was specifically dealing with the hypocritical "spiritual leaders' of the day, but I believe that the lesson can just as easily be applied to those who don't believe at all.  The problem with the Pharisees and the Sauducees was that they didn't believe and that they didn't want to believe because believing that Jesus was the messiah, the son of the living God, would have upset their world-view.  They were comfortable in their beliefs.

With most atheists that I've rubbed shoulders with (or even myself when I was one) the problem is only partly that we have no proof of God's existence.  The other half of the problem is that we would reject the proof if we saw it.  

As reference for this last  statement, go back and search this site for questions on miracles - why are there no miracles seen today, and other similar questions, and read the comments.  If you do, you'll see that the atheists asking here pretty much reject any miracle as coincidence, or something explainable via non-miraculous means.

Additionally, non-atheists from other religions wouldn't necessarily be convinced by miracles.  The Old Testament is filled with stories of other nations seeing the miracles of God, but still worshiping their own idols and gods.