The problem is very common for content heavy websites where content lies somewhere way down the hiearchy.
I am considering or assuming a few things here:
1. The webpage you are referring to is already crawled atleast once.
2. It is accessible from atleast one link on your homepage
3. It does not have a huge number of outbound links ..that is, around 100(within and outside your domain).
Your 1st task should be to get Google to crawl the page (s)
1. get a tool like gsite crawler and crawl your entire website. Create and submit a XML sitemap of your website to Google webmaster tools. Create links from your pages that are already indexed to this page (pages). That way, Google bot will find its way eventually.
2. Update fresh content on the page. Create a RSS feed of the content updates very frequently and serve it up front on the homepage or an important page of your website (which ranks well in Google).
All said, you have to wait and watch. There is no way you can forcefully ask Google to crawl your webpage. Also, updating your homepage content (just text with no link to your deep pages) wouldnt help in speeding up the process. But, its a good practice to keep your homepage content fresh so that Google bots visit your website regularly and you get Google love.
Hope that answers your question.