Perhaps you should try some spelling variations:
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"lead academic patent boarding papers" » "lead academic talent boarding papers", "lead academic content boarding papers", "lead academic papers boarding papers", "lead academic patient boarding papers", "lead academic patent bearing papers", "lead academic latin boarding papers", "lead academic patent working papers", "lead academic patent boarding pass", "lead academic patent boarding passes", "learn academic patent boarding papers", "leave academic patent boarding papers", "bad academic patent boarding papers"

Try widening your search to All Fields.

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• If you are trying to use Boolean operators, they must be ALL CAPS: (((("oecd academic patent boarding papers") OR ("lead academic patent boarding papers"))) OR ("oecd economic department working paper")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"oecd academic patent boarding papers\") OR (\"lead academic patent boarding papers\"))) or (\"oecd economic department working paper\"))".
• Removing quotes may allow a broader search: (((( oecd academic patent boarding papers ) OR ( lead academic patent boarding papers ))) or ( oecd economic department working paper )).
• Adding a wildcard symbol may retrieve word variants: (((("oecd academic patent boarding papers") OR ("lead academic patent boarding papers"))) or ("oecd economic department working paper"))*.