Perhaps you should try some spelling variations:
"harvard world bank studies book series." » "harvard world case studies book series.", "harvard world bank study book series.", "harvard world bank studies from series."
"harvard second urban studies book series." » "harvard second urban studies from series.", "harvard second loan studies book series.", "harvard second rural 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 bank studies book series.") or ("harvard second urban studies book series."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("harvard world bank studies book series.") OR ("harvard second urban studies book series.")).
• Removing quotes may allow a broader search: (( harvard world bank studies book series. ) or ( harvard second urban studies book series. )).
• Adding a wildcard symbol may retrieve word variants: (("harvard world bank studies book series.") or ("harvard second urban studies book series."))*.