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Hi Cornel, Thanks for your answer.

Assuming you are talking about the website in your profile...here is what I would check: Do you have any content duplication between your multiple language subdomains ? Do you have XML Sitemaps for your pages ? Are they submitted via the Webmaster Console ? If yes, what %age of your pages do you see indexed vs how many you submitted ? Have you considered doing an Images XML Sitemap ?

What exact do you mean by "when I checked targeting in German there were almost 5 billion pages"? I know you are referring to "million" but how did you arrive at that number? Other things to check: submit an updated sitemap to Google. How many pages show in the site map? what type of navigation does your site offer? Is all of the navigation visible in HTML? some sites offer dozens of versions of the same page. A print-friendly version, sorted ascending by price, sort descending by price, sort by size and many other properties. Each sort is a different page on your site. You can have a site with 150k worth of canonical pages, but 5 million actual pages. Google will not list the duplicate pages.

I do have an example of a site that I launched that normally would have done really well with an exact match domain and original content. However I could not seem to get the site to rank. I wondered if it was that the site was hosted in a bad "neighborhood"  because the IP had some adult sites on it as well (not mine). Or if the problem was that the site was hosted in too much of a cluster of similar sites so as to appear as a network of sites. I would also argue that with the Panda update that links from bad neighborhoods can hurt you.