Perhaps you should try some spelling variations:
"support group integration efforts." » "support group international efforts.", "support group conservation efforts.", "support group interaction efforts.", "support group interactions efforts.", "support erp integration efforts.", "support grant integration efforts."
"supply annual irrigation systems." » "supply canal irrigation systems.", "supply annual variation systems.", "supply annual inflation systems.", "supplies annual irrigation systems.", "supply ann irrigation systems.", "supply annual irrigation system."

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 annual irrigation systems.") OR ("support group integration efforts."))~.
• Removing quotes may allow a broader search: (( supply annual irrigation systems. ) or ( support group integration efforts. ))~.
• Adding a wildcard symbol may retrieve word variants: (("supply annual irrigation systems.") or ("support group integration efforts."))*.