Perhaps you should try some spelling variations:
22new spain » new spain
2f politics » 2 politics, 20 politics, 21 politics
2f sources » 20 sources, 22 sources, 23 sources
21 sources » 2.1 sources, 11 sources, 21 resources
21 source » 2.1 source, 2 source, 1 source
1 sources » 3 sources

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: %22new spain %2f politics AND government %2f 18th century %((2f sources) OR (((((((21 sources) OR (21 source))) OR (1 sources))) OR (2 sources))))%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22new spain %2f politics and government %2f 18th century %((2f sources) or (((((((21 sources) OR (21 source))) or (1 sources))) or (2 sources))))%22".
• Adding a wildcard symbol may retrieve word variants: %22new spain %2f politics and government %2f 18th century %((2f sources) or (((((((21 sources) OR (21 source))) or (1 sources))) or (2 sources))))%22*.