Perhaps you should try some spelling variations:
"supply china international poverty." » "supply china national poverty.", "supply iea international poverty.", "supply action international poverty.", "supply finance international poverty.", "supply chains international poverty.", "supply chain international poverty."
"supply water integration schemes." » "supply water integration schengen.", "supply water irrigation schemes.", "supply water integration regimes.", "supply water integrating schemes.", "supply factor integration schemes.", "supply filter integration schemes."

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply china international poverty.") OR ("supply water integration schemes."))~.
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