Perhaps you should try some spelling variations:
"harvard world bank studies book series." » "harvard world urban studies book series.", "harvard world case studies book series.", "harvard world bank study book series."
"harvard world war studies from series." » "harvard world case studies from series.", "harvard world war studies from sources.", "harvard world war studies from service.", "harvard world war studies from surveys."

You may be able to get more results by adjusting your search query.

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