Perhaps you should try some spelling variations:
universitat bonn » universitat wien (Expand Search), universitat berlin (Expand Search), universitat zu (Expand Search)
mohn » hohn (Expand Search), bohn (Expand Search), mohr (Expand Search), mohne (Expand Search), mhohn (Expand Search), mbohn (Expand Search)
ohn » ohne (Expand Search), hohn (Expand Search), bohn (Expand Search)
sohne » sohnee (Expand Search), shohne (Expand Search), sbohne (Expand Search), ohne (Expand Search)
sohn » sohne (Expand Search), shohn (Expand Search), sbohn (Expand Search)
john » johne (Expand Search), jhohn (Expand Search), jbohn (Expand Search), joh (Expand Search), hohn (Expand Search), bohn (Expand Search)
sjbohne » sjbohnee (Expand Search), sjbhohne (Expand Search), sjbbohne (Expand Search)

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: "(nuhr OR ((mohn OR ((mahn OR ohn) OR sohne)) OR ((sohn OR john) OR sjbohne))) universitat bonn~".
• Adding a wildcard symbol may retrieve word variants: (nuhr OR ((mohn OR ((mahn OR ohn) OR sohne)) OR ((sohn OR john) OR sjbohne))) universitat bonn*.