Perhaps you should try some spelling variations:
"harvard bord earlier studies book series." » "harvard bord early studies book series.", "harvard home earlier studies book series.", "harvard bord earlier studies books series.", "harvard bord earlier studies ebook series."
"harvard cold bank studies food surveys." » "harvard cold urban studies food surveys.", "harvard cold bank study food surveys.", "harvard cold bank studies from surveys.", "harvard cold bank students food surveys.", "harvard cold bank studies field surveys.", "harvard cold bank studies force 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.

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