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 build integration efforts."
"support group irrigation system." » "support group irrigation systems.", "support group irrigation water.", "support group irrigation scheme.", "support crop irrigation system.", "support drip irrigation system.", "support from irrigation system.", "support grant 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 group irrigation system."))~.
• Removing quotes may allow a broader search: (( support grid integration efforts. ) or ( support group irrigation system. ))~.
• Adding a wildcard symbol may retrieve word variants: (("support grid integration efforts.") or ("support group irrigation system."))*.