Perhaps you should try some spelling variations:
"supply data integration schemes." » "supply data irrigation schemes.", "supply data integration some.", "supply data integration theories.", "supply trade integration schemes.", "supply _ integration schemes.", "supply data integrity schemes.", "supply water integration schemes."
"supply spate irrigation scheme." » "supply spate irrigation systems.", "supply scale irrigation scheme.", "supply water irrigation scheme.", "supply surface irrigation scheme.", "supply system irrigation scheme.", "supply side irrigation scheme."

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply data integration schemes.") OR ("supply spate irrigation scheme."))~.
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