Is there any miracles happened in today's orthodox church, like healing, casting out demons, raising up the death,etc.??
There're so many. But the most important gift of the holy spirit, is not that a christian, a saint, can performe miracles, it's the gift of love,especially the unceasingly prayer for the whole world:
Excuse me, but I'll quote you some words concerning this issue:
"There are known instances when Blessed Staretz Silouan in prayer beheld something remote as though it were happening close by; when he saw into someone's future, or when profound secrets of the human soul were revealed to him. There are many people still alive who can bear witness to this in their own case but he himself never aspired to it and never accorded much significance to it. His soul was totally engulfed in compassion for the world. He concentrated himself utterly on prayer for the world, and in his spiritual life prized this love above all else." - St. Silouan the Athonite
"He who has the Holy Spirit in him, to however slight a degree,sorrows DAY and NIGHT for all mankind(with many tears).This heart is filled with pity for all God’s creatures,more especially for those who do not know God,or who resist Him and therefore are bound for the fire of Torment. For them,more than for himself,he prays day and night,that all may repent and know the Lord." St. Silouan
“When grace is working in the soul of someone who is praying,then he is flooded with the love of God,so that he can no longer bear what he experiences.Then,this love turns towards the humankind,whom he comes to love so much that he seeks to take upon himself the whole of human pain so that everyone else might be freed from it. In general he suffers with every grief and misery.This is why those who are advanced in prayer do not cease to pray for the world.
Joseph the Hesychast
Oh, that's the greatest miracle, that a soul can by just such deep prayers repent and know the Lord!
Elder Porphyrios is known that he had performed many many great,unbelievable miracles aside from the prayer for the world. http://www.oodegr.com/english/biblia/Porfyrios_Martyries_Empeiries/perieh.htm