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 world class studies from service." » "harvard cold class studies from service.", "harvard world cass studies from service.", "harvard world cases studies from service.", "harvard world css studies from service.", "harvard world class studies from serbia."

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 world class studies from service."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("harvard world bank studies book series.") OR ("harvard world class studies from service."))*.
• Removing quotes may allow a broader search: (( harvard world bank studies book series. ) or ( harvard world class studies from service. ))*.