My vietnam friend SMS to my mobile phone, I cant understand and when I used translator to translate it cant get it. Please Help....

" em hi vong mot ngay gan nhat em se gap lai a sao a biet viet tieng viec vay a chuc a ngu ngon nho a "

I know "em" is her and "a" is me. Why the translator cant fine this two word. Why they SMS alway like to write "em" amd "a".

Thank you.