Perhaps you should try some spelling variations:
"support estimate interaction term." » "support time interaction term.", "support state interactions term.", "support estimate interregional term.", "support climate interaction term.", "support state interaction term.", "support estimate interaction _."
"support can integration series." » "support can integration theories.", "support can integrating services.", "support can integration schemes.", "support chain integration series.", "support care integration series.", "support urban integration series.", "support bank integration series.", "support a integration series.", "support tax integration series."

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• Performing a fuzzy search may retrieve terms with similar spellings: (("support can integration series.") or ("support estimate interaction term."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("support can integration series.") OR ("support estimate interaction term.")).
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