Perhaps you should try some spelling variations:
rohr » lohr (Expand Search), ruhr (Expand Search)
mohr » mehr (Expand Search), lohr (Expand Search), mohn (Expand Search)
mjohn » mohn (Expand Search), mjohne (Expand Search), mjhohn (Expand Search), mjbohn (Expand Search), mjoh (Expand Search), mhohn (Expand Search), mbohn (Expand Search)
ohn » ohne (Expand Search), hohn (Expand Search), bohn (Expand Search)
john » johne (Expand Search), jhohn (Expand Search), jbohn (Expand Search), joh (Expand Search), hohn (Expand Search), bohn (Expand Search)
hbohn » hbohne (Expand Search), hbhohn (Expand Search), hbbohn (Expand Search), hohn (Expand Search), bohn (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: "(rohr OR ((mohr OR ((mjohn OR ohn) OR john)) OR (hbohn OR sohn))) university bochum~".
• Adding a wildcard symbol may retrieve word variants: (rohr OR ((mohr OR ((mjohn OR ohn) OR john)) OR (hbohn OR sohn))) university bochum*.