Perhaps you should try some spelling variations:
"economic interpretation" » "economic integration", "okonomische interpretation", "semantic interpretation"
"economic interactions" » "economic integration", "dynamic interactions", "economics international"
"economic intervention" » "economic interaction", "economic integration", "economic information"

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 interactions") OR ((("economic intervention") OR ("economic interpretation")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"economic interactions\") or (((\"economic intervention\") OR (\"economic interpretation\"))))".
• Removing quotes may allow a broader search: (( economic interactions ) or ((( economic intervention ) OR ( economic interpretation )))).
• Adding a wildcard symbol may retrieve word variants: (("economic interactions") or ((("economic intervention") OR ("economic interpretation"))))*.