Perhaps you should try some spelling variations:
"supply policy interventions social." » "supply policy intervention social.", "supply policy intervencion social.", "supply policy interactions social.", "supply policies interventions social.", "supplier policy interventions social.", "support policy interventions social."
"supply school integration theories." » "supply school integration theorems.", "supply school integrationstheorie 2.", "supply school integration theory.", "supply school reintegration theories.", "supply school integrating theories.", "supply school interactions theories.", "supplies school integration theories.", "support school integration theories.", "supply shock integration theories."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("supply policy interventions social.") OR ("supply school integration theories."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"supply policy interventions social.\") OR (\"supply school integration theories.\"))*".
• Removing quotes may allow a broader search: (( supply policy interventions social. ) OR ( supply school integration theories. ))*.