Perhaps you should try some spelling variations:
xgreat britain » great britain, great brittain, great britains
zgreat britain » great britain, great brittain, great britains
2f foreign » 2 foreign, 23 foreign, 22 foreign
24 foreign » 4 foreign, 2 foreign, 14 foreign
23 denmark » 2.3 denmark, 3 denmark, 13 denmark
sf early » ef early, f early, self early
20 early » 10 early, 1820 early, 1720 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: %((xgreat britain) OR (zgreat britain)) %((2f foreign) OR (24 foreign)) relations %23 denmark %((((sf early) OR (20 early))) OR (21 early)) works to 1800%22*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((xgreat britain) or (zgreat britain)) %((2f foreign) OR (24 foreign)) relations %23 denmark %((((sf early) or (20 early))) or (21 early)) works to 1800%22*".