I would like to know if there are any Ph.D. courses offered by Universities in the world in the same field of study
Maybe it's just cos we've had a heck of a lot of these questions lately but my instinctive response is:
1. Yes there probably are.
2. If you're not capable of finding out which universities they are, you're not likely to succeed with a PhD. Try to develop some ingenuity - maybe talk to your course tutors? Use a search engine? Read some relevant papers and see where the authors work?
My work here is done.