Perhaps you should try some spelling variations:
"supply chain integration theory." » "supply chain integration through.", "supply chain information theory.", "supply chain integration report.", "supply trade integration theory.", "supply data integration theory.", "supply grid integration theory."
"supply grid irrigation schemes." » "supply grid irrigation scheme.", "supply grid irrigation systems.", "supply drip irrigation schemes.", "supply syria irrigation schemes.", "supply crop irrigation schemes.", "supply crowd irrigation schemes.", "support grid 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 chain integration theory.") or ("supply grid irrigation schemes."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply chain integration theory.") OR ("supply grid irrigation schemes."))*.
• Removing quotes may allow a broader search: (( supply chain integration theory. ) or ( supply grid irrigation schemes. ))*.