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 change irrigation scheme." » "supply change mitigation scheme.", "supply canal irrigation scheme.", "supply large irrigation scheme.", "supply change irrigation systems.", "supply charges irrigation scheme.", "supply channels irrigation scheme.", "supply chain's irrigation scheme."

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

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