Perhaps you should try some spelling variations:
universitat bochum » universitat bonn (Expand Search)
ruhr » ruhe (Expand Search), nuhr (Expand Search), rohr (Expand Search)
mbohn » mohn (Expand Search), mbohne (Expand Search), mbhohn (Expand Search), mbmohn (Expand Search)
bohn » bohne (Expand Search), bhohn (Expand Search), bmohn (Expand Search)
ohn » ohne (Expand Search), hohn (Expand Search), mohn (Expand Search)
sohn » sohne (Expand Search), shohn (Expand Search), smohn (Expand Search)
hbohn » hbohne (Expand Search), hbhohn (Expand Search), hbmohn (Expand Search), hohn (Expand Search)
john » johne (Expand Search), jhohn (Expand Search), jmohn (Expand Search), joh (Expand Search), hohn (Expand Search)
sjjbohn » sjjbohne (Expand Search), sjjbhohn (Expand Search), sjjbmohn (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: "(ruhr OR ((bohn OR ((mbohn OR ohn) OR sohn)) OR ((hbohn OR john) OR sjjbohn))) universitat bochum~".
• Adding a wildcard symbol may retrieve word variants: (ruhr OR ((bohn OR ((mbohn OR ohn) OR sohn)) OR ((hbohn OR john) OR sjjbohn))) universitat bochum*.