Perhaps you should try some spelling variations:
"harvard camp bank studies from sources." » "harvard cold bank studies from sources.", "harvard home bank studies from sources.", "harvard camp bank study from sources.", "harvard amp blank studies from sources."
"harvard worst urban studies book series." » "harvard cost urban studies book series.", "harvard first urban studies book series.", "harvard most urban studies book series.", "harvard worst urban studies books series.", "harvard worst urban studies ebook series."

Try widening your search to All Fields.

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

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