Perhaps you should try some spelling variations:
"d'economies politique" » "d'economie politique", "l'economie politique", "d'economie politque", "d'economics politique", "d'economiques politique", "d'economicss politique"
"economie politique" » "economic politique", "economique politique", "economics politique"

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: (("economie politique") OR ("d'economies politique")).
• Removing quotes may allow a broader search: (( economie politique ) or ( d'economies politique )).
• Adding a wildcard symbol may retrieve word variants: (("economie politique") or ("d'economies politique"))*.