Perhaps you should try some spelling variations:
"supply cost integration theories." » "supply cost integration theory.", "supply cost integration through.", "supply cost integration efforts.", "supply south integration theories.", "supply tool integration theories.", "supply can integration theories.", "supply costs integration theories."
"supply change irrigation system." » "supply change mitigation system.", "supply canal irrigation system.", "supply large irrigation system.", "supply change irrigation systems.", "supply change irrigation water.", "supply change irrigation scheme.", "supply charges irrigation system.", "supply chain irrigation system.", "supply chains irrigation system."

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 change irrigation system."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply cost integration theories.") OR ("supply change irrigation system.")).
• Removing quotes may allow a broader search: (( supply cost integration theories. ) or ( supply change irrigation system. )).
• Adding a wildcard symbol may retrieve word variants: (("supply cost integration theories.") or ("supply change irrigation system."))*.