Perhaps you should try some spelling variations:
ruhr » ruhe (Expand Search), nuhr (Expand Search), rohr (Expand Search)
mohr » mehr (Expand Search), lohr (Expand Search), moor (Expand Search)
mohn » bohn (Expand Search), john (Expand Search), mahn (Expand Search), mohne (Expand Search), mbohn (Expand Search), mjohn (Expand Search)
ohn » ohne (Expand Search), bohn (Expand Search), john (Expand Search)
johne » johnee (Expand Search), jbohne (Expand Search), jjohne (Expand Search), ohne (Expand Search), sohne (Expand Search), john (Expand Search)
hohn » hohne (Expand Search), hbohn (Expand Search), hjohn (Expand Search), hahn (Expand Search)
sohn » sohne (Expand Search), sbohn (Expand Search), sjohn (Expand Search)
university » universitat (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 ((mohn OR ohn) OR johne)) OR ((hohn OR huhn) OR sohn))) university bochum~".
• Adding a wildcard symbol may retrieve word variants: (ruhr OR ((mohr OR ((mohn OR ohn) OR johne)) OR ((hohn OR huhn) OR sohn))) university bochum*.