Hoan nghênh!
I am sorry, but Vietnamese version of this site is not yet available. I think, that T99 will be usefull for you (to remove diacritical marks from letters Ă Đ Ơ Ư from Vietnamese alphabet that cause decrease maximal length of sms from 160 to 70), so please read about T99 in one of the following languages:
English
Polish
CzechIf you can speak Vietnamese, please help translate the site to this language - send me an email, I will write you all details in an answer. Thank you.
I can't speek Vietnamese, so I don't know if sms in that language without diacritics, and tone marks still make sense. I hope it does, but if you rather want T99 to use VIQR (Vietnamese Quoted-Readable), or something else - please let me know.
