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 » hohn (Expand Search), bohn (Expand Search), john (Expand Search), mohne (Expand Search), mhohn (Expand Search), mbohn (Expand Search)
ohn » ohne (Expand Search), hohn (Expand Search), bohn (Expand Search)
johne » johnee (Expand Search), jhohne (Expand Search), jbohne (Expand Search), ohne (Expand Search), sohne (Expand Search), john (Expand Search)
hjohn » hjohne (Expand Search), hjhohn (Expand Search), hjbohn (Expand Search), hohn (Expand Search), john (Expand Search)
sohn » sohne (Expand Search), shohn (Expand Search), sbohn (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 ((hjohn OR huhn) OR sohn))) university bochum~".
• Adding a wildcard symbol may retrieve word variants: (ruhr OR ((mohr OR ((mohn OR ohn) OR johne)) OR ((hjohn OR huhn) OR sohn))) university bochum*.