Perhaps you should try some spelling variations:
2f politics » 2 politics, 22 politics, 23 politics
21 politics » 2 politics, 1 politics, 11 politics
20 politics » 2 politics, 10 politics, 20 political
1 sources » 3 sources

Try widening your search to All Fields.

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) OR (new spain)) %((((2f politics) OR (21 politics))) OR (20 politics)) AND government %2f 18th century %((2 sources) OR (1 sources))%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((22new spain) or (new spain)) %((((2f politics) OR (21 politics))) or (20 politics)) and government %2f 18th century %((2 sources) or (1 sources))%22".
• Adding a wildcard symbol may retrieve word variants: %((22new spain) or (new spain)) %((((2f politics) OR (21 politics))) or (20 politics)) and government %2f 18th century %((2 sources) or (1 sources))%22*.