Perhaps you should try some spelling variations:
"rohr universitat bonn" » "der universitat bonn" (Expand Search), "rohr universitat wien" (Expand Search), "rohr universitat berlin" (Expand Search), "rohr universitat zu" (Expand Search)
"mohr university bochum" » "mehr university bochum" (Expand Search), "lohr university bochum" (Expand Search), "moor university bochum" (Expand Search)
"mohn university bochum" » "sohn university bochum" (Expand Search), "hohn university bochum" (Expand Search), "bohn university bochum" (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: (("rohr universitat bonn") OR ((("mohr university bochum") OR ("mohn university bochum"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"rohr universitat bonn\") OR (((\"mohr university bochum\") OR (\"mohn university bochum\"))))".
• Removing quotes may allow a broader search: (( rohr universitat bonn ) OR ((( mohr university bochum ) OR ( mohn university bochum )))).
• Adding a wildcard symbol may retrieve word variants: (("rohr universitat bonn") OR ((("mohr university bochum") OR ("mohn university bochum"))))*.