Perhaps you should try some spelling variations:
"support grid innovation systems." » "support grid information systems.", "support grid irrigation systems.", "support grid sanitation systems.", "support green innovation systems.", "support drive innovation systems.", "support trade innovation systems.", "support agri innovation systems.", "support grant innovation systems.", "support group innovation systems."
"supply surface irrigation system." » "supply scale irrigation system.", "supply surface irrigation systems.", "supply surface irrigation water.", "supply surface irrigation scheme.", "supply service irrigation system."

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("support grid innovation systems.") OR ("supply surface irrigation system."))~.
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