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