Perhaps you should try some spelling variations:
22great britain » great britain, xgreat britain, zgreat britain
22 foreign » 2 foreign, 12 foreign, 24 foreign
23 foreign » 3 foreign, 2 foreign, 13 foreign
2f denmark » 22 denmark, 23 denmark, 2.3 denmark
2 denmark » _ denmark, 5 denmark, 4 denmark
2.1 early » 1.1 early, 11 early

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: %22great britain %((22 foreign) OR (23 foreign)) relations %((2f denmark) OR (2 denmark)) %2.1 early works to 1800%22*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22great britain %((22 foreign) or (23 foreign)) relations %((2f denmark) OR (2 denmark)) %2.1 early works to 1800%22*".