Perhaps you should try some spelling variations:
xgreat britain » great britain, zgreat britain, great brittain
23 foreign » 3 foreign, 2 foreign, 24 foreign
13 foreign » 3 foreign, 1 foreign, 10 foreign
2f denmark » 2 denmark, 22 denmark, 23 denmark
21 early » 2.1 early, 1 early, 11 early
f early » ef early, sf early, 8 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 %((23 foreign) OR (13 foreign)) relations %2f denmark %((f early) OR (21 early)) works to 1800%22*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%xgreat britain %((23 foreign) OR (13 foreign)) relations %2f denmark %((f early) or (21 early)) works to 1800%22*".