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