Bui Long Thanh

[Ha Le <ha@math.wayne.edu>]

Hi ba'c Tri,

Ca?m o*n Ba'c dda~ gia? nho*`i. 

>Minh nghi la: neu ban ngoi lau khong cu dong, nguoi thuong thi khac ngua
>ngay chan tay ma ngo ngoay phai trai, khong co gi than bi ca.

Ba'c ly' gia?i ra^'t la` khoa ho.c. Ru't kinh nghie^.m la^`n 
tru*o*'c ta^.p kho^ng tha`nh, la^`n sau Ba'c vo*'i anh ba.n thu*? 
kie^'m  cho^~ ngo^`i o? cho^~ na`o ho*i to^i to^'i, nhie^`u muo^~i thi` 
kha? na(ng ngo. ngua^.y se~ cao ho*n.

>Noi la ong ta MOI TIEN, thi theo mot khia canh nao do khong han dung.
>Vi phuong phap cua ong ta cung co mang lai mot so hieu qua nhat dinh.
>Nhung khong co nghia la phai than bi hoa no.

To^i thi` tha^'y ddo'ng 2-30000 ddo^`ng la` qua' re? so vo'*i 10 tie^'ng 
ddo^`ng ho^` ca? tha^`y la^~n tro` "ddo^? mo^` ho^i ho^.t" vi` ba'c. Ne^'u 
BLT  mo*? lo` da.y vo~ cha(?ng ha.n thi` co`n kie^'m ddu*o*.c kha' ho*n 
nhie^`u. 

cheers!
Ha`