Gospel Movie "God's Name Has Changed?!" (1) - Are God's Words All in the Bible?

Gospel Movie "God's Name Has Changed?!" (1) - Are God's Words All in the Bible?

 Are All of God's words in the Bible? Do God's words exist outside of the Bible? 

Storyline:

 Her name is Wang Hua, and she is a house church preacher in Southern China. After she began to believe in the Lord, she found in the Bible that God was called Jehovah in the Old Testament, and was called Jesus in the New Testament. "Why does God have different names?" Wang Hua was extremely puzzled about this. She tried to find the answer in the Bible, but failed to grasp the mystery…. But she firmly believed that "There is none other name under heaven given among men, so Jesus alone is the Savior, and that so long as one held on to the name of Jesus, they would surely be raptured into the kingdom of heaven when the Lord comes again." Yet one day, Wang Hua heard some shocking news: "God's name has changed!" After that, her heart could no longer remain calm….