Add "livejournal.com" to your search parameter? I do that for torrent sites when Google is capable of searching them for what I want better than their own search engines. That way you should only get results from livejournal.com. I just tested it and they do come up on Google that way. For me anyway. I'm using Google Chrome as my browser though. If there's some discrepancy between Google and Livejournal where they won't show up on searches from Google.com then I'm unaware of that issue