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 » sohn (Expand Search), hohn (Expand Search), bohn (Expand Search), mohne (Expand Search), msohn (Expand Search), mhohn (Expand Search)
ohn » ohne (Expand Search), sohn (Expand Search), hohn (Expand Search)
johne » johnee (Expand Search), jsohne (Expand Search), jhohne (Expand Search), ohne (Expand Search), sohne (Expand Search), john (Expand Search)
hbshohn » hbshohne (Expand Search), hbshsohn (Expand Search), hbshhohn (Expand Search)
ssohne » ssohnee (Expand Search), sssohne (Expand Search), sshohne (Expand Search), sohne (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 ((hbshohn OR huhn) OR ssohne))) university bochum~".
• Adding a wildcard symbol may retrieve word variants: (ruhr OR ((mohr OR ((mohn OR ohn) OR johne)) OR ((hbshohn OR huhn) OR ssohne))) university bochum*.