Perhaps you should try some spelling variations:
"harvard world urban studies book series." » "harvard cold urban studies book series.", "harvard worst urban studies book series.", "harvard world urban studies books series.", "harvard world urban studies ebook series."
"harvard bond bank studies from serbia." » "harvard cold bank studies from serbia.", "harvard home bank studies from serbia.", "harvard bond bank study from serbia.", "harvard blood bank studies from serbia.", "harvard land bank studies from serbia.", "harvard bad bank studies from serbia."

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