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