Perhaps you should try some spelling variations:
2f foreign » 2 foreign, 23 foreign, 24 foreign
2f denmark » 22 denmark, 2.3 denmark, 2.4 denmark
23 denmark » 2.3 denmark, 3 denmark, 13 denmark
1722 early » 1727 early
2 denmark » _ denmark, 5 denmark, 4 denmark

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: %great britain %2f foreign relations %((((2f denmark) OR (2 denmark))) OR (23 denmark)) %1722 early works to 1800%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%great britain %2f foreign relations %((((2f denmark) OR (2 denmark))) or (23 denmark)) %1722 early works to 1800%22".
• Adding a wildcard symbol may retrieve word variants: %great britain %2f foreign relations %((((2f denmark) OR (2 denmark))) or (23 denmark)) %1722 early works to 1800%22*.