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 series." » "harvard cold bad studies from series.", "harvard home bad studies from series.", "harvard good based studies from series.", "harvard good eadi studies from series.", "harvard good oecd studies from series.", "harvard good bad studies rom series.", "harvard good bad studies from services.", "harvard good bad studies forum 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 study book series.") OR ("harvard good bad studies from series."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"harvard world bank study book series.\") OR (\"harvard good bad studies from series.\"))".
• Removing quotes may allow a broader search: (( harvard world bank study book series. ) OR ( harvard good bad studies from series. )).
• Adding a wildcard symbol may retrieve word variants: (("harvard world bank study book series.") OR ("harvard good bad studies from series."))*.