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 worse case studies from surveys." » "harvard home case studies from surveys.", "harvard worse case studies from survey.", "harvard worse case studies firm surveys.", "harvard worse case studies force surveys.", "harvard worst case studies from surveys.", "harvard worker case studies from surveys.", "harvard world case studies from surveys."

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