Perhaps you should try some spelling variations:
"harvard world bank study book series." » "harvard cold bank study book series.", "harvard world bank studies book series."
"harvard good bad studies from service." » "harvard cold bad studies from service.", "harvard home bad studies from service.", "harvard good bad studies from serbia.", "harvard good based studies from service.", "harvard good eadi studies from service.", "harvard good oecd studies from service."

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