You could go to Tools-->Options-->Job Logs and change the level of information that is included - 'Summary information, directories, and files processed' would be the obvious choice. However, bear in mind that the job log will be BIG.
You could also split the volumes into separate jobs - this at least would tell you which volume is causing the problem.
When the job stops - can you look at the properties? Is it stuck on a particular file? Is it always stuck on this file/folder?
Finally, you can put the agent into debug mode using the BESTART -ZL command - this will create a debug log: sys:\bkupexec\log\ndmpd.log which may help.