Perhaps you should try some spelling variations:
"supply trade integration theories." » "supply trade integration theorems.", "supply trade integrationstheorie 2.", "supply trade integration theory.", "supply case integration theories."
"supply south integration schemes." » "supply south integration schengen.", "supply south irrigation schemes.", "supply south integration regimes.", "supply youth integration schemes.", "supply about integration schemes.", "supply dutch integration schemes.", "supply southern integration schemes.", "supply costs integration schemes.", "supply cost integration schemes."

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

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