Are you connected (green bars in the bottom left corner) properly?? Do you see the firewall icon (brick wall in front of the blue earth)? If you're not connected then you won't find search results. Go through this info & make sure you're only using 1 firewall & that it's configured properly. Do the port test & see what result you get.
Connection problems? Check here first!

If you're connected well & not firewalled the problem could be your ISP. Who is your ISP?