Perhaps you should try some spelling variations:
"earth frontiers of global political economy" » "earth frontiers of global politics economy", "earth frontiers of global policy economy", "earth frontier of global political economy", "last frontiers of global political economy", "energy frontiers of global political economy"
"research frontiers of global political economy" » "research frontiers of global politics economy", "research frontiers of global policy economy"
"arctic frontiers of global public economy" » "arctic frontiers of global public economics", "arctic frontiers of global republic economic"

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 ("research frontiers of global political economy"))) OR ("arctic frontiers of global public economy")).
• Removing quotes may allow a broader search: (((( earth frontiers of global political economy ) or ( research frontiers of global political economy ))) or ( arctic frontiers of global public economy )).
• Adding a wildcard symbol may retrieve word variants: (((("earth frontiers of global political economy") or ("research frontiers of global political economy"))) or ("arctic frontiers of global public economy"))*.