Perhaps you should try some spelling variations:
xgreat britain » great britain, zgreat britain, great brittain
2f foreign » 2 foreign, 23 foreign, 22 foreign
24 foreign » 4 foreign, 2 foreign, 14 foreign
2f denmark » 2 denmark, 22 denmark, 23 denmark
22 early » 2 early, 12 early, 1722 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 %((2f foreign) OR (24 foreign)) relations %2f denmark %((22 early) OR (21 early)) works to 1800%22*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%xgreat britain %((2f foreign) OR (24 foreign)) relations %2f denmark %((22 early) or (21 early)) works to 1800%22*".