Perhaps you should try some spelling variations:
"harvard second rural studies book series." » "harvard cold rural studies book series.", "harvard second rural students book series.", "harvard second israel studies book series.", "harvard second legal studies book series.", "harvard second rural studies ebook series."
"harvard world bank studies books series." » "harvard cold bank studies books series.", "harvard world bank studies booklet series.", "harvard world bank student books series.", "harvard world bank studies bgs series.", "harvard world urban studies books series.", "harvard world bank study books series.", "harvard world bank studies books strips.", "harvard world bank studies hooks services.", "harvard world bank studies ebooks 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 books series.") or ("harvard second rural studies book series."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("harvard world bank studies books series.") OR ("harvard second rural studies book series.")).
• Removing quotes may allow a broader search: (( harvard world bank studies books series. ) or ( harvard second rural studies book series. )).
• Adding a wildcard symbol may retrieve word variants: (("harvard world bank studies books series.") or ("harvard second rural studies book series."))*.