Perhaps you should try some spelling variations:
"earth frontiers of global political economy" » "earth frontiers of global politics economy", "earth frontier of global political economy", "last frontiers of global political economy", "research frontiers of global political economy"
"earth frontiers of global policy economy" » "earth frontier of global policy economy", "last frontiers of global policy economy", "research frontiers of global policy economy", "earth frontiers of global policy economic", "earth frontiers of global policy ecology", "earth frontiers of global policy economics", "earth frontiers of global public economy"
"earth frontiers of global polish economy" » "earth frontier of global polish economy", "last frontiers of global polish economy", "research frontiers of global polish economy", "earth frontiers of global politics economy", "earth frontiers of global polio economy", "earth frontiers of global polity economy", "earth frontiers of global populism economy"

Try widening your search to All Fields.

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("earth frontiers of global political economy") OR ((("earth frontiers of global policy economy") OR ("earth frontiers of global polish economy")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"earth frontiers of global political economy\") or (((\"earth frontiers of global policy economy\") OR (\"earth frontiers of global polish economy\"))))".
• Removing quotes may allow a broader search: (( earth frontiers of global political economy ) or ((( earth frontiers of global policy economy ) OR ( earth frontiers of global polish economy )))).
• Adding a wildcard symbol may retrieve word variants: (("earth frontiers of global political economy") or ((("earth frontiers of global policy economy") OR ("earth frontiers of global polish economy"))))*.