Perhaps you should try some spelling variations:
"supply side integration schemes." » "supply side integration schengen.", "supply side irrigation schemes.", "supply side integration regimes.", "supply die integration schemes.", "supply de integration schemes.", "supply life integration schemes."
"supply syria irrigation system." » "supply syria irrigation systems.", "supply syria irrigation water.", "supply syria irrigation scheme.", "supply africa irrigation system.", "supply drip irrigation system.", "supply surge irrigation system.", "supply social irrigation system.", "supply sierra 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 side integration schemes.") or ("supply syria irrigation system."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply side integration schemes.") OR ("supply syria irrigation system."))*.
• Removing quotes may allow a broader search: (( supply side integration schemes. ) or ( supply syria irrigation system. ))*.