Looking For My Dad (Jimmy-Pleiku)

My name is Mai Lam and I am an Ameriasian child that came here when I was 9 and I've been looking for my Dad but I don't have much info on him. I asked my Mother about Jimmy McDonald as much as she could remember but not much there. I have forgot my Vietnamese so it's difficult to communicate with her. I do visit her once a year but still no help from her or anyone. I don't want to give up and hopefully he will see this or anyone to help me out. I will be very thankful. Regards, Mai Lam