Perhaps you should try some spelling variations:
12 economics » 2 economics, 1 economics, 5 economics
13 economics » 13 economic, 1 economics, 3 economics
14 economics » 14 economic, 1 economics, 4 economics
12 economic » 2 economic, 2 economics

Try widening your search to All Fields.

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: %22ireland %((12 economic) OR (((((12 economics) OR (13 economics))) OR (14 economics)))) conditions%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22ireland %((12 economic) or (((((12 economics) OR (13 economics))) or (14 economics)))) conditions%22".
• Adding a wildcard symbol may retrieve word variants: %22ireland %((12 economic) or (((((12 economics) OR (13 economics))) or (14 economics)))) conditions%22*.