Perhaps you should try some spelling variations:
zgreat britain » great britain, xgreat britain, great brittain
2.3 denmark » 2.4 denmark, 13 denmark, 2 denmark
2f foreign » 2 foreign, 23 foreign, 24 foreign
2f denmark » 2 denmark, 22 denmark, 2.4 denmark
23 denmark » 13 denmark, 2 denmark, 22 denmark
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: %zgreat britain %2f foreign relations %((2f denmark) OR (((23 denmark) OR (2.3 denmark)))) %21 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) or (((23 denmark) OR (2.3 denmark)))) %21 early works to 1800%22*".