Perhaps you should try some spelling variations:
"support grid integration efforts." » "support grid international efforts.", "support grid conservation efforts.", "support agri integration efforts.", "support grant integration efforts.", "support group integration efforts."
"support grain irrigation systems." » "support gray irrigation systems.", "support gravity irrigation systems.", "support drip irrigation systems.", "support grant irrigation systems.", "support trainer irrigation systems.", "support group irrigation systems.", "support grain 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: (("support grid integration efforts.") OR ("support grain irrigation systems."))~.
• Removing quotes may allow a broader search: (( support grid integration efforts. ) or ( support grain irrigation systems. ))~.
• Adding a wildcard symbol may retrieve word variants: (("support grid integration efforts.") or ("support grain irrigation systems."))*.