Perhaps you should try some spelling variations:
zgreat britain » great britain, xgreat britain, great brittain
20 political » 10 political
20 politics » 2 politics, 10 politics, 5 politics
29 1714 » 20 1714, 29 1713, 29 1784

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 %((((20 politics) OR (20 political))) OR (2 political)) AND government %29 1714-1760%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%zgreat britain %((((20 politics) OR (20 political))) or (2 political)) and government %29 1714-1760%22".
• Adding a wildcard symbol may retrieve word variants: %zgreat britain %((((20 politics) OR (20 political))) or (2 political)) and government %29 1714-1760%22*.