group_concat(c1 order by hex(c1))
A,a,À,Á,Ã,à,á,ã,Ạ,ạ,Ả,ả
Ă,ă,Ắ,ắ,Ằ,ằ,Ẳ,ẳ,Ẵ,ẵ,Ặ,ặ
Â,â,Ấ,ấ,Ầ,ầ,Ẩ,ẩ,Ẫ,ẫ,Ậ,ậ
B,b
C,c
D,d
Đ,đ
E,e,È,É,è,é,Ẹ,ẹ,Ẻ,ẻ,Ẽ,ẽ
Ê,ê,Ế,ế,Ề,ề,Ể,ể,Ễ,ễ,Ệ,ệ
G,g
H,h
I,i,Ì,Í,ì,í,Ĩ,ĩ,Ỉ,ỉ,Ị,ị
K,k
L,l
M,m
O,o,Ò,Ó,Õ,ò,ó,õ,Ọ,ọ,Ỏ,ỏ
Ô,ô,Ố,ố,Ồ,ồ,Ổ,ổ,Ỗ,ỗ,Ộ,ộ
Ơ,ơ,Ớ,ớ,Ờ,ờ,Ở,ở,Ỡ,ỡ,Ợ,ợ
P,p
Q,q
R,r
S,s
T,t
U,u,Ù,Ú,ù,ú,Ũ,ũ,Ụ,ụ,Ủ,ủ
Ư,ư,Ứ,ứ,Ừ,ừ,Ử,ử,Ữ,ữ,Ự,ự
V,v
X,x
Y,y,Ý,ý,Ỳ,ỳ,Ỵ,ỵ,Ỷ,ỷ,Ỹ,ỹ