Perhaps you should try some spelling variations:
22great britain » great britain, xgreat britain, zgreat britain
2f foreign » 2 foreign, 23 foreign, 24 foreign
2f denmark » 2 denmark, 23 denmark, 2.3 denmark
22 denmark » 2 denmark, 23 denmark, 8.2 denmark
2f early » 20 early, 22 early, f early
21 early » 2.1 early, 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 %2f foreign relations %((2f denmark) OR (22 denmark)) %((2f early) OR (21 early)) works to 1800%22*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22great britain %2f foreign relations %((2f denmark) OR (22 denmark)) %((2f early) or (21 early)) works to 1800%22*".