Perhaps you should try some spelling variations:
"economic interventionism" » "economic interventions", "economic intervention", "ergonomic interventions"
"economic interaction" » "economic interactions", "economic integration", "dynamic interaction"

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: (("economic interventionism") OR ("economic interaction")).
• Removing quotes may allow a broader search: (( economic interventionism ) or ( economic interaction )).
• Adding a wildcard symbol may retrieve word variants: (("economic interventionism") or ("economic interaction"))*.