Perhaps you should try some spelling variations:
ruhr » ruhe (Expand Search), rohr (Expand Search)
mehr » meer (Expand Search)
john » sohn (Expand Search), joh (Expand Search), bohn (Expand Search), johne (Expand Search), jsohn (Expand Search), jbohn (Expand Search)
jjohne » jsohne (Expand Search), jjohe (Expand Search), jbohne (Expand Search), jjohnee (Expand Search), jjsohne (Expand Search), jjbohne (Expand Search)
ohn » ohne (Expand Search), sohn (Expand Search), bohn (Expand Search)
hohn » hohne (Expand Search), hsohn (Expand Search), hbohn (Expand Search), hahn (Expand Search), sohn (Expand Search), huhn (Expand Search)
sbohn » sbohne (Expand Search), sbsohn (Expand Search), sbbohn (Expand Search), sohn (Expand Search), bohn (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 nuhr) OR ((mehr OR ((john OR ohn) OR jjohne)) OR (hohn OR sbohn))) university bochum~".
• Adding a wildcard symbol may retrieve word variants: ((ruhr OR nuhr) OR ((mehr OR ((john OR ohn) OR jjohne)) OR (hohn OR sbohn))) university bochum*.