Perhaps you should try some spelling variations:
xgreat britain » zgreat britain, great brittain, great britains
23 foreign » 3 foreign, 2 foreign, 13 foreign
23 denmark » 2.3 denmark, 3 denmark, 13 denmark
21 early » 2.1 early, 1 early, 1.1 early
11 early » 1 early, 1791 early, 7 early
f early » ef early, sf 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) OR (great britain)) %23 foreign relations %23 denmark %((f 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) or (great britain)) %23 foreign relations %23 denmark %((f early) or (((21 early) OR (11 early)))) works to 1800%22*".