Perhaps you should try some spelling variations:
"harvard world bank studies from series." » "harvard cold bank studies from series.", "harvard world urban studies from series.", "harvard world bank studies rom series.", "harvard world bank studies from services.", "harvard world bank studies forum series."
"harvard food bank study from sources." » "harvard cold bank study from sources.", "forward food bank study from sources.", "harvard home bank study from sources.", "harvard good bank study from sources.", "harvard blood bank study from sources.", "harvard good banks study from sources."

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