If we're crawling some of your site's articles, but not all of them, there may be some technical issues with some of your articles. It's also possible that our crawler isn't able to locate the articles on your site.
First, please review our technical requirements to ensure that the articles in question are crawlable by our robot.
Next, submit your articles to Google News Sitemaps, which offers error reports specific to Google News. These error reports explain any issues we experienced while crawling or extracting articles from your site.
You may find it useful to look at the Google News Help Forum where publishers share helpful tips and expertise.
If the problem still persists, please contact us.