They are looking for pages that contain the terms "login.aspx", "register" and "retrieve password" in the URL structure (inurl command) and the term "employment" in the body of the page (intext: command).
You can find more about Google's search operators here: http://www.googleguide.com/advanced_operators.html
In this case it seems they are looking to access an ASP.NET source file, it could be that they are searching for a web to hack..