Great question Terry!
More than half the ESL/EFL job market is in Asia. They are set up with their schools in ways that they can recruit teachers, they often have recruiters within their countries, they can afford websites for their schools and lots of them want representatives of 'Western Culture'.
There are still jobs all over the world, often going to those countries you will see that upon arrival. They will not advertise as they don't have the resources or know where to start. Anyone else want to add to this?
Thanks for pointing that out, because unfortunately it is the reality of internet job searching. Please add helpful hints for job searches you all have done for other non-Asian countries!