Perhaps you should try some spelling variations:
"harvard cold wave studies book series." » "harvard cold game studies book series.", "harvard cold care studies book series.", "harvard cold five studies book series.", "harvard cold water studies book series.", "harvard cold war studies book series.", "harvard cold wave studies books series.", "harvard cold wave studies ebook series."
"harvard world case studies book series." » "harvard world class studies book series.", "harvard world case studies books series.", "harvard world case studies ebook series."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("harvard world case studies book series.") or ("harvard cold wave studies book series."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("harvard world case studies book series.") OR ("harvard cold wave studies book series.")).
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• Adding a wildcard symbol may retrieve word variants: (("harvard world case studies book series.") or ("harvard cold wave studies book series."))*.