Perhaps you should try some spelling variations:
"economiques politiques" » "historiques politiques"
"oeconomique politique" » "d'economie politique", "l'economie politique", "l'oeconomie politique"
"economie politique" » "economies politique", "economic politique", "economique 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 ((("oeconomique politique") OR ("economiques politiques")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"economie politique\") or (((\"oeconomique politique\") OR (\"economiques politiques\"))))".
• Removing quotes may allow a broader search: (( economie politique ) or ((( oeconomique politique ) OR ( economiques politiques )))).
• Adding a wildcard symbol may retrieve word variants: (("economie politique") or ((("oeconomique politique") OR ("economiques politiques"))))*.