Perhaps you should try some spelling variations:
"harvard world war studies from surveys." » "harvard world war studies from survey.", "harvard world war studies firm surveys.", "harvard world war studies force surveys.", "harvard world case studies from surveys."
"harvard cold bank studies food surveys." » "harvard cold urban studies food surveys.", "harvard cold case studies food surveys.", "harvard cold bank study food surveys.", "harvard cold bank studies led surveys.", "harvard cold bank studies force surveys.", "harvard cold bank studies field surveys.", "harvard cold bank studies firm surveys.", "harvard world bank studies food surveys.", "harvard bond bank studies food surveys.", "harvard good bank studies food surveys."

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (("harvard world war studies from surveys.") OR ("harvard cold bank studies food surveys."))~.
• Removing quotes may allow a broader search: (( harvard world war studies from surveys. ) or ( harvard cold bank studies food surveys. ))~.
• Adding a wildcard symbol may retrieve word variants: (("harvard world war studies from surveys.") or ("harvard cold bank studies food surveys."))*.