Perhaps you should try some spelling variations:
"harvard cold winters studies book series." » "harvard cold winters studies from series.", "harvard could winters studies book series.", "harvard col winters studies book series.", "harvard old winters studies book series.", "harvard cold winter studies book series.", "harvard cold winners studies book series."
"harvard world war studies book series." » "harvard world war studies from series.", "harvard world case studies book series.", "harvard world bank 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 winters studies book series.") or ("harvard world war studies book series."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("harvard cold winters studies book series.") OR ("harvard world war studies book series."))*.
• Removing quotes may allow a broader search: (( harvard cold winters studies book series. ) or ( harvard world war studies book series. ))*.