Websites with Search Fields - determining how to return full list

I'm trying to determine how, when in a website that has a search field(s) which queries on table lists, to "crack the code" of what to place in the search field to return the entire list. Until now, it's always been trial and error, but I'm beginning to come up short with that method.

For example, take this website: http://ift.tt/1Mrdyu9

The first and last name fields are required to perform a query. I'm trying to determine what to enter into those fields to bring back the entire list. Via Chrome's developer tools, I've determined the form is built with jquery. Beyond that, I'm at a roadblock. Is it possible that it's not possible to get the full list with this site?