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

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: (("american cities and political economy.") or ("american politics and ecological economics."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("american cities and political economy.") OR ("american politics and ecological economics.")).
• Removing quotes may allow a broader search: (( american cities and political economy. ) or ( american politics and ecological economics. )).
• Adding a wildcard symbol may retrieve word variants: (("american cities and political economy.") or ("american politics and ecological economics."))*.