Perhaps you should try some spelling variations:
"harvard world bank studies book series." » "harvard cold bank studies book series.", "harvard world urban studies book series.", "harvard world bank study book series.", "harvard world bank studies books series.", "harvard world bank studies ebook series."
"harvard worst case studies book series." » "harvard worse case studies book series.", "harvard worst case studies books series.", "harvard worst case studies ebook 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 worst case studies book series.") OR ("harvard world bank studies book series."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"harvard worst case studies book series.\") OR (\"harvard world bank studies book series.\"))".
• Removing quotes may allow a broader search: (( harvard worst case studies book series. ) OR ( harvard world bank studies book series. )).
• Adding a wildcard symbol may retrieve word variants: (("harvard worst case studies book series.") OR ("harvard world bank studies book series."))*.