Perhaps you should try some spelling variations:
harvard based » hardware based
sale studies » scale studies, sage studies, state studies
based urban » basic urban
m services » e services, d services, de services
studies m » studies my, studies 3, studies 5
cold sale » child sale, cold state, could save
book » books, ebook

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( harvard based urban studies m services. ) or ( harvard cold sale studies book series. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( harvard based urban studies m services. ) OR ( harvard cold sale studies book series. )).
• Adding a wildcard symbol may retrieve word variants: (( harvard based urban studies m services. ) or ( harvard cold sale studies book series. ))*.