Perhaps you should try some spelling variations:
german » germans (Expand Search)
gehrmann » hermann (Expand Search), germans (Expand Search), herrmann (Expand Search)
national » nationale (Expand Search), nationala (Expand Search), nationaler (Expand Search)
nationalen » nationaleen (Expand Search), nationalaen (Expand Search), nationaleren (Expand Search), nationale (Expand Search)
academie » akademie (Expand Search), academia (Expand Search)
academic » academia (Expand Search), akademie (Expand Search)

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

• Performing a fuzzy search may retrieve terms with similar spellings: (german OR gehrmann) (national OR nationalen) (academie OR academic) of sciences leopoldina~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(german OR gehrmann) (national OR nationalen) (academie OR academic) of sciences leopoldina".
• Adding a wildcard symbol may retrieve word variants: (german OR gehrmann) (national OR nationalen) (academie OR academic) of sciences leopoldina*.