Help me find a fully funded PhD / DEng in SE

I am from Pakistan and have done my masters in Systems Engineering.
My bachelors was in physics.
I have been doing business and running two companies since my masters.
Now I am looking for fully funded phd options in USA.
Is that near impossible to get the fully funded phd in USA university as someone told me ?
Which are the options that can easily take me in for the phd ?
Kindly help me in it ....