Perhaps you should try some spelling variations:
"harvard world case studies book series." » "harvard cold case studies book series.", "harvard world class studies book series.", "harvard world case studies books series.", "harvard world case studies ebook series."
"harvard world bank studies force surveys." » "harvard cold bank studies force surveys.", "harvard world bank studies formal surveys.", "harvard world bank studies from surveys.", "harvard world bank studies food surveys.", "harvard world bank studies force survey.", "harvard world bank studies firm surveys.", "harvard world urban studies force surveys.", "harvard world bank study force surveys."

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