Perhaps you should try some spelling variations:
2.1 economic » 21 economic, 11 economic, 1 economics
2f economic » imf economic, 2.0 economic, ddf economic
2f humor » 2 humor, 2.2 humor, _ humor
23 humor » 13 humor, 2 humor, 3 humor

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 %((2f economic) OR (2.1 economic)) conditions %((2f humor) OR (23 humor))%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22ireland %((2f economic) OR (2.1 economic)) conditions %((2f humor) or (23 humor))%22".
• Adding a wildcard symbol may retrieve word variants: %22ireland %((2f economic) OR (2.1 economic)) conditions %((2f humor) or (23 humor))%22*.