Perhaps you should try some spelling variations:
"harvard cold winters studies from surveys." » "harvard cold winters studies from survey.", "harvard cold winters studies firm surveys.", "harvard cold winters studies force surveys.", "harvard cold winter studies from surveys.", "harvard cold winners studies from surveys."
"harvard cold case studies book series." » "harvard world case studies book series.", "harvard cold wave studies book series."

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (("harvard cold winters studies from surveys.") OR ("harvard cold case studies book series."))~.
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• Adding a wildcard symbol may retrieve word variants: (("harvard cold winters studies from surveys.") or ("harvard cold case studies book series."))*.