Perhaps you should try some spelling variations:
xgreat britain » great britain, zgreat britain, great brittain
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
sf early » ef early, f early, self early
20 early » 10 early, 1820 early, 1720 early
21 early » 2.1 early, 1 early, 1.1 early
11 early » 1 early, 1791 early, 7 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: %xgreat britain %2f foreign relations %((23 denmark) OR (2.3 denmark)) %((((sf early) OR (20 early))) OR (((21 early) OR (11 early)))) works to 1800%22*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%xgreat britain %2f foreign relations %((23 denmark) OR (2.3 denmark)) %((((sf early) or (20 early))) or (((21 early) or (11 early)))) works to 1800%22*".