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 price irrigation systems." » "support private irrigation systems.", "support pricing irrigation systems.", "support africa irrigation systems.", "support process irrigation systems.", "support policy irrigation systems.", "export price irrigation systems.", "support price 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 price irrigation systems.") OR ("support grid integration efforts."))~.
• Removing quotes may allow a broader search: (( support price irrigation systems. ) or ( support grid integration efforts. ))~.
• Adding a wildcard symbol may retrieve word variants: (("support price irrigation systems.") or ("support grid integration efforts."))*.