Perhaps you should try some spelling variations:
"economic integrationism" » "economic integration", "economic interactions", "economic intregration", "eeconomic integrationism", "eeconomic intregrationism", "eeconomics integrationism"
"economic intervention" » "economic interaction", "economic interpretation", "economic integration"
"conomic integration" » "economic integration", "economic intregration", "economics integration"

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