Thank you Andy,
I do went to 2 Dr in my country, one from FV hospital (international hospital) and one from Blood transfusion and haematology center of Ho Chi Minh City...
The first Dr look at the HbF and said he is in Intermediate to Major Thal
The second Dr said he is not Minor Thal, and sugest to follow him and do blood test every 6 months.
I myself confuse and come to this site for helping.
Now I'm clear, once again...thanks tou so much Andy!!!