Perhaps you should try some spelling variations:
german » germans (Expand Search)
gehrmann » hermann (Expand Search), germans (Expand Search), herrmann (Expand Search)
national » nationala (Expand Search), nationaler (Expand Search), nationales (Expand Search)
nationalen » nationalaen (Expand Search), nationaleren (Expand Search), nationalesen (Expand Search)
nationale » nationalae (Expand Search), nationalere (Expand Search), nationalese (Expand Search)
academic » academia (Expand Search), academie (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) OR nationale) academic of sciences leopoldina~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(german OR gehrmann) ((national OR nationalen) OR nationale) academic of sciences leopoldina".
• Adding a wildcard symbol may retrieve word variants: (german OR gehrmann) ((national OR nationalen) OR nationale) academic of sciences leopoldina*.