Perhaps you should try some spelling variations:
"american cities and political economic." » "american cities and policy economic.", "american cities and ecological economics.", "african cities and political economic.", "american countries and political economic."
"american cities and political economy." » "african cities and political economy.", "american countries and political economy."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("american cities and political economy.") OR ("american cities and political economic."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"american cities and political economy.\") OR (\"american cities and political economic.\"))".
• Removing quotes may allow a broader search: (( american cities and political economy. ) OR ( american cities and political economic. )).
• Adding a wildcard symbol may retrieve word variants: (("american cities and political economy.") OR ("american cities and political economic."))*.