Perhaps you should try some spelling variations:
"harvard worst case studies from surveys." » "harvard worst case studies from survey.", "harvard worst case studies firm surveys.", "harvard worst case studies force surveys.", "harvard worse case studies from surveys."
"harvard worst case studies from series." » "harvard worst case studies rom series.", "harvard worst case studies from services.", "harvard worst case studies forum series.", "harvard worse case studies from 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 worst case studies from series.") OR ("harvard worst case studies from surveys."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"harvard worst case studies from series.\") OR (\"harvard worst case studies from surveys.\"))".
• Removing quotes may allow a broader search: (( harvard worst case studies from series. ) OR ( harvard worst case studies from surveys. )).
• Adding a wildcard symbol may retrieve word variants: (("harvard worst case studies from series.") OR ("harvard worst case studies from surveys."))*.