Perhaps you should try some spelling variations:
"supply chain international politics." » "supply chain international political.", "supply chain international policy.", "supply chain international relations.", "supply china international politics.", "supply can international politics.", "supply care international politics."
"supply sharing international economics." » "supply savings international economics.", "supply measuring international economics.", "supply managing international economics.", "supply chains international economics.", "supply sharing international economic."

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (("supply chain international politics.") or ("supply sharing international economics."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply chain international politics.") OR ("supply sharing international economics.")).
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• Adding a wildcard symbol may retrieve word variants: (("supply chain international politics.") or ("supply sharing international economics."))*.