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 books series.", "harvard second rural studies ebook series."
"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."

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 rural 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 rural studies book series."))*.
• Removing quotes may allow a broader search: (( harvard world bank studies book series. ) or ( harvard second rural studies book series. ))*.