Hundreds of very important phrases and verses have been omitted from a small number of very unreliable, corrupt manuscripts of the New Testament. For example phrases to do with the Word of God (Lk 4:4), the blood of Jesus (Col 1:14), salvation (Acts 8:37), the deity of Christ (1 Tim 3:16) and fasting (Mt 17:21, Mk 9:29). These manuscripts also contradict each other in numerous places, for example in the book of Revelation. Most English Bible versions are based on these corrupted manuscripts.
The King James Version (KJV), New King James Version (NKJV), 21st Century KJV and a number of other Bible versions are, however, based on the vast majority of Greek manuscripts, known collectively as the “Received Text” and contain hundreds of verses, phrases and words that are missing from almost all other versions of the Bible – refer to the following for a list: http://www.trinitarianbiblesociety.org/site/articles/tk.asp
To read more about this subject see For more information on why the Received Text/Majority Text is the most accurate Greek New Testament text, see here and here and http://www.trinitarianbiblesociety.org/site/articles/tr-art.asp.