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), lohr (Expand Search), mohn (Expand Search)
hohn » hahn (Expand Search), huhn (Expand Search), hohne (Expand Search), hbohn (Expand Search), hjohn (Expand Search)
ohn » ohne (Expand Search), bohn (Expand Search), john (Expand Search)
sohn » sohne (Expand Search), sbohn (Expand Search), sjohn (Expand Search)
hbohn » hbohne (Expand Search), hbbohn (Expand Search), hbjohn (Expand Search), bohn (Expand Search)
sjjohn » sjjohne (Expand Search), sjjbohn (Expand Search), sjjjohn (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 ((hohn OR ohn) OR sohn)) OR (hbohn OR sjjohn))) universitat bochum~".
• Adding a wildcard symbol may retrieve word variants: (ruhr OR ((mohr OR ((hohn OR ohn) OR sohn)) OR (hbohn OR sjjohn))) universitat bochum*.