Perhaps you should try some spelling variations:
"harvard world class studies book series." » "harvard world cases studies book series.", "harvard world cost studies book series.", "harvard world past studies book series.", "harvard world class studies from series."
"harvard cold case studies book series." » "harvard cold case studies from 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.

• Performing a fuzzy search may retrieve terms with similar spellings: (("harvard cold case studies book series.") or ("harvard world class studies book series."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("harvard cold case studies book series.") OR ("harvard world class studies book series."))*.
• Removing quotes may allow a broader search: (( harvard cold case studies book series. ) or ( harvard world class studies book series. ))*.