[Ali Imran]

Yes..there are 26 arabic Quran ...

For this, you need to understand the Ahrufs and the Qiraats. I gave you an example earlier, where a verse can be recited as "Owner of the day of Judgement" and "King of the day of Judgement". Such differences were already noted during the time of the Prophet, who told us about why there are such differences. 

I can explain but it will take a long while to type it up so let's just stick to basics.