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 bad case studies book series." » "harvard cold case studies book series.", "harvard camp case studies book series.", "harvard based case studies book series.", "harvard id case studies book series.", "harvard d case studies book series.", "harvard bad case studies books series.", "harvard bad 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 world bank studies book series.") or ("harvard bad case studies book series."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("harvard world bank studies book series.") OR ("harvard bad case studies book series.")).
• Removing quotes may allow a broader search: (( harvard world bank studies book series. ) or ( harvard bad case studies book series. )).
• Adding a wildcard symbol may retrieve word variants: (("harvard world bank studies book series.") or ("harvard bad case studies book series."))*.