Perhaps you should try some spelling variations:
"support group integration efforts." » "support group international efforts.", "support group conservation efforts.", "support grid integration efforts.", "support run integration efforts.", "support through integration efforts.", "support from integration efforts.", "support grant integration efforts."
"supply crop irrigation schemes." » "supply crop irrigation scheme.", "supply crop irrigation systems.", "supply drip irrigation schemes.", "supply scale irrigation schemes.", "supply canal irrigation schemes.", "supply crowd irrigation schemes.", "supply curve irrigation schemes."

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

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