Perhaps you should try some spelling variations:
"harvard world war studies book series." » "harvard cold war studies book series.", "harvard world war stories book series.", "harvard world early studies book series.", "harvard world war studies books series.", "harvard world war studies ebook series."
"harvard world case studies rom series." » "harvard cold case studies rom series.", "harvard world case studies from series.", "harvard world case studies rome series.", "harvard world case studies role series.", "harvard world class studies rom series.", "harvard world case studies forum series."

Try widening your search to All Fields.

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 war studies book series.") or ("harvard world case studies rom series."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("harvard world war studies book series.") OR ("harvard world case studies rom series.")).
• Removing quotes may allow a broader search: (( harvard world war studies book series. ) or ( harvard world case studies rom series. )).
• Adding a wildcard symbol may retrieve word variants: (("harvard world war studies book series.") or ("harvard world case studies rom series."))*.