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