Perhaps you should try some spelling variations:
"american universities" » "african universities", "american university", "italian universities"
"german universities" » "african universities", "european universities", "italian universities"
"german university" » "american university", "african university"

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (("german university") OR ((("german universities") OR ("american universities")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"german university\") or (((\"german universities\") OR (\"american universities\"))))".
• Removing quotes may allow a broader search: (( german university ) or ((( german universities ) OR ( american universities )))).
• Adding a wildcard symbol may retrieve word variants: (("german university") or ((("german universities") OR ("american universities"))))*.