I imagine it is a time of high stress and pressure for him. I know I have done the same in similar situations. "I appreciate the advice/thoughts/sentiment/etc. but I really don't want to talk about it right now".

He probably realizes the kind intent behind what you are telling him, and I'm sure if he wants to talk about anything he will bring it up.

The best advice I can think to give to you is talk to him about anything else. Don't worry about trying to work his job hunting into conversation. Don't talk about school. Send him a youtube video you think he might laugh at, or a funny picture you find online. How his favorite sports team is doing.

Best of luck (: