Perhaps you should try some spelling variations:
"supply cost integration theories." » "supply cost integration theorems.", "supply cost integrationstheorie 2.", "supply cost integration theory.", "supply post integration theories.", "supply test integration theories.", "supply about integration theories.", "supply costs integration theories."
"supply social integration schemes." » "supply social integration schengen.", "supply social irrigation schemes.", "supply social integration regimes.", "supply global integration schemes.", "supply financial integration schemes.", "supply regional 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 cost integration theories.") OR ("supply social integration schemes."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"supply cost integration theories.\") OR (\"supply social integration schemes.\"))*".
• Removing quotes may allow a broader search: (( supply cost integration theories. ) OR ( supply social integration schemes. ))*.