Perhaps you should try some spelling variations:
"supply cost integration theory." » "supply cost integration through.", "supply cost information theory.", "supply cost innovation theory.", "supply post integration theory.", "supply test integration theory.", "supply about integration theory.", "supply costs integration theory."
"supply flood irrigation scheme." » "supply flood irrigation systems.", "supply flood mitigation scheme.", "supply led irrigation scheme.", "supply farm irrigation scheme.", "supply food irrigation scheme.", "supply from irrigation scheme.", "supply crowd 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 flood irrigation scheme.") or ("supply cost integration theory."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply flood irrigation scheme.") OR ("supply cost integration theory.")).
• Removing quotes may allow a broader search: (( supply flood irrigation scheme. ) or ( supply cost integration theory. )).
• Adding a wildcard symbol may retrieve word variants: (("supply flood irrigation scheme.") or ("supply cost integration theory."))*.