Perhaps you should try some spelling variations:
"regulation school" » "deregulating school", "regulation section", "regulation some"
"regulation social" » "legislation social", "population social", "regulation section"
"education school" » "education preschool", "education section", "education sector"

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: (((("regulation school") OR ("regulation social"))) OR ("education school")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"regulation school\") OR (\"regulation social\"))) or (\"education school\"))".
• Removing quotes may allow a broader search: (((( regulation school ) OR ( regulation social ))) or ( education school )).
• Adding a wildcard symbol may retrieve word variants: (((("regulation school") OR ("regulation social"))) or ("education school"))*.