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