Perhaps you should try some spelling variations:
"economic interventionism" » "economic interventions", "economic intersections", "economic interactions", "economic interpretationism", "economic integrationism", "economic interactionsism"
"ergonomic interventions" » "robotic interventions", "endoscopic interventions", "genetic interventions"
"economic intervention" » "economic interpretation", "economic integration", "economic interactions"
"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 ("ergonomic interventions"))) OR ((("economic intervention") OR ("economic interaction")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"economic interventionism\") OR (\"ergonomic interventions\"))) or (((\"economic intervention\") or (\"economic interaction\"))))".
• Removing quotes may allow a broader search: (((( economic interventionism ) OR ( ergonomic interventions ))) or ((( economic intervention ) or ( economic interaction )))).
• Adding a wildcard symbol may retrieve word variants: (((("economic interventionism") OR ("ergonomic interventions"))) or ((("economic intervention") or ("economic interaction"))))*.