Perhaps you should try some spelling variations:
zgreat britain » great britain, xgreat britain, great brittain
2f foreign » 2 foreign, 23 foreign, 24 foreign
2f denmark » 2 denmark, 22 denmark, 23 denmark
sf early » ef early, f early, self early
10 early » 1800 early, 1820 early, 1770 early
21 early » 2.1 early, 1 early, 1.1 early
11 early » 1 early, 1791 early, 5 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: %zgreat britain %2f foreign relations %2f denmark %((((sf early) OR (10 early))) OR (((21 early) OR (11 early)))) works to 1800%22*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%zgreat britain %2f foreign relations %2f denmark %((((sf early) or (10 early))) or (((21 early) OR (11 early)))) works to 1800%22*".