Perhaps you should try some spelling variations:
"the sloan foundation studies" » "the sloan foundational studies", "the sloan oxidation studies", "the sloan foundation stones", "the lean foundation studies", "the human foundations studies", "the roman foundations studies"
"the schuman foundation studies" » "the schuman foundational studies", "the schuman oxidation studies", "the schuman foundation stones", "the human foundations studies", "the schemes foundations studies", "the boekman foundation studies"

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: (("the sloan foundation studies") OR ("the schuman foundation studies"))*.
• Removing quotes may allow a broader search: (( the sloan foundation studies ) or ( the schuman foundation studies ))*.