When I chose "Vietnamese" language option and apply, a part of whole texts get chaos:
(http://i.imgur.com/MEjHat3.jpg)
---------------------------------------------------------------------------------------------------------------------------------
I guess it happen because errors of the font, I sometime get this font's errors in Word while writing Vietnamese.
Thank you for reading my post!
Here is another capture:
(http://i.imgur.com/UxKOL5N.jpg)