Perhaps you should try some spelling variations:
"supply side integration efforts." » "supply side international efforts.", "supply side conservation efforts.", "supply trade integration efforts.", "supply asian integration efforts.", "supply grid integration efforts."
"supply case irrigation system." » "supply case irrigation systems.", "supply case irrigation water.", "supply case irrigation scheme.", "supply scale irrigation system.", "supply change irrigation system.", "supply canal irrigation system.", "supply cost irrigation system.", "supply chain irrigation system.", "supply curve irrigation system."

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"supply side integration efforts.\") OR (\"supply case irrigation system.\"))~".
• Removing quotes may allow a broader search: (( supply side integration efforts. ) OR ( supply case irrigation system. ))~.
• Adding a wildcard symbol may retrieve word variants: (("supply side integration efforts.") OR ("supply case irrigation system."))*.