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), rohr (Expand Search)
mohn » sohn (Expand Search), bohn (Expand Search), john (Expand Search), mohne (Expand Search), msohn (Expand Search), mbohn (Expand Search)
ohn » ohne (Expand Search), sohn (Expand Search), bohn (Expand Search)
sohne » sohnee (Expand Search), ssohne (Expand Search), sbohne (Expand Search), ohne (Expand Search), sohn (Expand Search)
hohn » hohne (Expand Search), hsohn (Expand Search), hbohn (Expand Search), hahn (Expand Search), sohn (Expand Search), huhn (Expand Search)
sjjohne » sjjohnee (Expand Search), sjjsohne (Expand Search), sjjbohne (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 moor) OR ((mohn OR ohn) OR sohne)) OR (hohn OR sjjohne))) universitat bochum~".
• Adding a wildcard symbol may retrieve word variants: (ruhr OR (((mohr OR moor) OR ((mohn OR ohn) OR sohne)) OR (hohn OR sjjohne))) universitat bochum*.