Perhaps you should try some spelling variations:
forschungsberichte des » forschungsberichte der, forschungsbericht zum, forschungsbericht 3
lane nordrhein » lande nordrhein, land nordrhein, landes nordrhein
3 landes » 3 landau, 3 lane, 3 lange
des lane » des lage, des land, des lan

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "\"\\"((\\\"forschungsbericht ((3 landes) or (3 land)) nordrhein-westfalen\\\") OR (\\\"forschungsberichte des lane nordrhein-westfalen\\\"))\\"\"".
• Removing quotes may allow a broader search: ((\ forschungsbericht ((3 landes) or (3 land)) nordrhein-westfalen\ ) OR (\ forschungsberichte des lane nordrhein-westfalen\ )).