Ahmed, Sorry could find very little on this large tablet, came across a couple sites and glass is no longer available, Ebay has an assy. $312.00 US plus shipping, whether they would ship to your location? You would have to contact and ask at link below. Found no info. to show you how to replace the screen or glass on your own. Good luck.
I hope this helped you out, if so let me know by pressing the helpful button.
http://www.ebay.com/itm/Genuine-Samsung-Galaxy-View-18-4-034-SM-T670-Black-LCD-Screen-amp-Digitizer-GH97-18-/331829631251