Perhaps you should try some spelling variations:
2 politische » 2 political
2 politics » 3 politics, 2 political
21 sources » 2.1 sources, 2 sources, 11 sources
f sources » 2 sources, 3 sources, 4 sources
1 sources » 2 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)) %((2 politics) OR (2 politische)) AND government %2f 18th century %((((f sources) OR (1 sources))) OR (21 sources))%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((22new spain) or (new spain)) %((2 politics) or (2 politische)) and government %2f 18th century %((((f sources) OR (1 sources))) or (21 sources))%22".
• Adding a wildcard symbol may retrieve word variants: %((22new spain) or (new spain)) %((2 politics) or (2 politische)) and government %2f 18th century %((((f sources) OR (1 sources))) or (21 sources))%22*.