Perhaps you should try some spelling variations:
universitat bochum » universitat bonn (Expand Search)
ruhr » ruhe (Expand Search), nuhr (Expand Search), rohr (Expand Search)
mohr » mehr (Expand Search), mohn (Expand Search), moor (Expand Search)
lohr » lehr (Expand Search), lahr (Expand Search), rohr (Expand Search)
hohn » hahn (Expand Search), huhn (Expand Search)
john » joh (Expand Search), bohn (Expand Search)
sjjohn » sjjoh (Expand Search), sjbohn (Expand Search)
hbohn » bohn (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 (((mohr OR lohr) OR ((hohn OR john) OR sohn)) OR (hbohn OR sjjohn))) universitat bochum~".
• Adding a wildcard symbol may retrieve word variants: (ruhr OR (((mohr OR lohr) OR ((hohn OR john) OR sohn)) OR (hbohn OR sjjohn))) universitat bochum*.