Perhaps you should try some spelling variations:
ruhr » ruhe (Expand Search), nuhr (Expand Search)
rohr » mohr (Expand Search)
lohr » lehr (Expand Search), mohr (Expand Search)
lahr » lahn (Expand Search), lehr (Expand Search), bahr (Expand Search)
mohn » sohn (Expand Search), hohn (Expand Search), mahn (Expand Search)
john » sohn (Expand Search), joh (Expand Search), hohn (Expand Search)
bohn » bonn (Expand Search), sohn (Expand Search), hohn (Expand Search)
university » universitat (Expand Search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (ruhr OR (rohr OR (((lohr OR lahr) OR jahr) OR ((mohn OR john) OR bohn)))) university bochum~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(ruhr OR (rohr OR (((lohr OR lahr) OR jahr) OR ((mohn OR john) OR bohn)))) university bochum".
• Adding a wildcard symbol may retrieve word variants: (ruhr OR (rohr OR (((lohr OR lahr) OR jahr) OR ((mohn OR john) OR bohn)))) university bochum*.