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 urban studies book series." » "harvard world ran 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 world urban studies book series.") or ("harvard world war studies from sources."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("harvard world urban studies book series.") OR ("harvard world war studies from sources."))*.
• Removing quotes may allow a broader search: (( harvard world urban studies book series. ) or ( harvard world war studies from sources. ))*.