Perhaps you should try some spelling variations:
"harvard world war studies from sources." » "harvard world war studies fuel sources.", "harvard world war studies from survey.", "harvard world case studies from sources.", "harvard world bank studies from sources."
"harvard world war studies from series." » "harvard world case studies from series.", "harvard world bank studies from series.", "harvard world war studies from service.", "harvard world war studies from surveys.", "harvard world war studies from serbian."

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 from series.") OR ("harvard world war studies from sources."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"harvard world war studies from series.\") OR (\"harvard world war studies from sources.\"))".
• Removing quotes may allow a broader search: (( harvard world war studies from series. ) OR ( harvard world war studies from sources. )).
• Adding a wildcard symbol may retrieve word variants: (("harvard world war studies from series.") OR ("harvard world war studies from sources."))*.