Perhaps you should try some spelling variations:
"supply data integration theories." » "supply data integration theorems.", "supply data integrationstheorie 2.", "supply data integration theory.", "supply data integrity theories."
"supply grain irrigation schemes." » "supply grain irrigation scheme.", "supply grain irrigation systems.", "supply gray irrigation schemes.", "supply gravity irrigation schemes.", "supply drip irrigation schemes.", "supply chain irrigation schemes.", "supply main irrigation schemes.", "supply ukraine irrigation 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 grain irrigation schemes.") or ("supply data integration theories."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply grain irrigation schemes.") OR ("supply data integration theories."))*.
• Removing quotes may allow a broader search: (( supply grain irrigation schemes. ) or ( supply data integration theories. ))*.