Perhaps you should try some spelling variations:
"harvard world war studies from series." » "harvard world case studies from series.", "harvard world bank studies from series.", "harvard world war studies from sources.", "harvard world war studies from service.", "harvard world war studies from surveys."
"harvard cold tracer studies book series." » "harvard could tracer studies book series.", "harvard col tracer studies book series.", "harvard old tracer studies book series.", "harvard cold traces studies book series.", "harvard cold trace studies book series.", "harvard cold trader studies book 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 cold tracer studies book series.") or ("harvard world war studies from series."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("harvard cold tracer studies book series.") OR ("harvard world war studies from series.")).
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• Adding a wildcard symbol may retrieve word variants: (("harvard cold tracer studies book series.") or ("harvard world war studies from series."))*.