Perhaps you should try some spelling variations:
"harvard world war studies from series." » "harvard cold war studies from series.", "harvard world war stories from series.", "harvard world early studies from series.", "harvard world war studies rom series.", "harvard world war studies from services.", "harvard world war studies forum series."
"harvard world bank studies food surveys." » "harvard cold bank studies food surveys.", "harvard world urban studies food surveys.", "harvard world bank study food surveys.", "harvard world bank students food surveys.", "harvard world bank studies field surveys.", "harvard world bank studying food surveys.", "harvard world bank studies from surveys.", "harvard world bank studies force surveys."

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (("harvard world war studies from series.") or ("harvard world bank studies food surveys."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("harvard world war studies from series.") OR ("harvard world bank studies food surveys.")).
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• Adding a wildcard symbol may retrieve word variants: (("harvard world war studies from series.") or ("harvard world bank studies food surveys."))*.