Secret901, thanks for your explanation regarding the use of Mai in the
last letter. Please translate the following:

Hien Mai day, ban  an tam di, da la ban voi nhau thi kho khan chung ta
phai giup do lan nhau chu, Mai khong buc minh , Mai se hoc, ban co
bang long day Mai khong? va  Mai se day ban  hocTieng Cua  xu so Mai 
ban co chiu hoc khong?
Nha ban o nong thon thuoc Tieu Ban nao vay? ban nha roi khi di du lich
ve ban o dau?
hay ban co du dinh lam an gi khac u?
Vai dong tham ban, khi nao ranh ban nho viet thu cho Mai nhe, Mai mong
lam do, chuc ban suc khoe va luon gap that nhieu dieu may man trong
cuoc song.

Hi again iguazu,
Below is the translation.  Keep in mind that the author refers to
herself by name throughout the letter, but I've translated it as "I"
for convenience.  Also the word that I translated as "you" is "b?n",
which literally means "friend".  Vietnamese does not have a word that
can be directly translated as "you".

===================================Translation begins=======================
It's me, Hien Mai.  Don't you worry, since we're already friends we
should help each other when it's difficult.  I am not
mad/impatient/uncomfortable, I will learn; do you agree to teach me? 
And I will teach you the language of my homeland, do you agree?
You live a rural area of which [US] state?  After selling the house
and going on vacation, where you you stay when you come back?
Or do you have plans to change your lifestyle/occupation?
Just writing to know how you're doing.  Whenever you're free remember
to write me, OK?  I look forward to it.  I wish you good health and
plenty of luck in life.
===================================Translation ends===========================

secret901-ga