Perhaps you should try some spelling variations:
"harvard bond bank studies from surveys." » "harvard bond urban studies from surveys.", "harvard bond bank study from surveys.", "harvard bond bank studies from survey.", "harvard bond bank studies force surveys.", "harvard bond bank studies firm survey.", "harvard blood bank studies from surveys.", "harvard land bank studies from surveys.", "harvard bad bank studies from surveys."
"harvard blood case studies firm surveys." » "harvard blood case studies food surveys.", "harvard blood case studies pre surveys.", "harvard blood case studies firm survey.", "harvard flood case studies firm 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 bond bank studies from surveys.") or ("harvard blood case studies firm surveys."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("harvard bond bank studies from surveys.") OR ("harvard blood case studies firm surveys.")).
• Removing quotes may allow a broader search: (( harvard bond bank studies from surveys. ) or ( harvard blood case studies firm surveys. )).
• Adding a wildcard symbol may retrieve word variants: (("harvard bond bank studies from surveys.") or ("harvard blood case studies firm surveys."))*.