Just a suggestion: try to find VNmese guys, especially those from VNU, in Physics Programs in the States, then ask for their opinions. Another option is trying to apply VEF scholarship. As far as I know, they are quite flexible.
no news from PSU.
Btw, I submitted quite late. My application was completed quite late, 3 weeks after the deadline.
So surprised. I saw your profile in another topic. It seemed you did have a strong profile. What has happened there? Did they say anything about their decision?
I have heard that they also put an critical eye on their supplemental application form.