Perhaps you should try some spelling variations:
22great britain » great britain, xgreat britain, zgreat britain
2.3 denmark » 2.4 denmark, 13 denmark, 2 denmark
2f foreign » 2 foreign, 23 foreign, 24 foreign
23 denmark » 13 denmark, 2 denmark, 22 denmark
2f early » 20 early, ef early, f early
21 early » 2.1 early, 11 early, 1.1 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 %((23 denmark) OR (2.3 denmark)) %((2f early) OR (((21 early) OR (1 early)))) works to 1800%22*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22great britain %2f foreign relations %((23 denmark) OR (2.3 denmark)) %((2f early) or (((21 early) or (1 early)))) works to 1800%22*".