Perhaps you should try some spelling variations:
ruhr » ruhe (Expand Search), nuhr (Expand Search), rohr (Expand Search)
lohr » lehr (Expand Search), rohr (Expand Search)
mohr » moor (Expand Search), rohr (Expand Search)
mehr » meer (Expand Search)
mohn » hohn (Expand Search), bohn (Expand Search), john (Expand Search)
lahr » jahr (Expand Search), lahn (Expand Search), lehr (Expand Search)
leer » heer (Expand Search), meer (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 ((lohr OR ((mohr OR mehr) OR (mohn OR sohn))) OR (lahr OR leer))) university bochum~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(ruhr OR ((lohr OR ((mohr OR mehr) OR (mohn OR sohn))) OR (lahr OR leer))) university bochum".
• Adding a wildcard symbol may retrieve word variants: (ruhr OR ((lohr OR ((mohr OR mehr) OR (mohn OR sohn))) OR (lahr OR leer))) university bochum*.