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 political)) AND government %2f 18th century %((2 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 political)) and government %2f 18th century %((2 sources) or (21 sources))%22".
• Adding a wildcard symbol may retrieve word variants: %((22new spain) or (new spain)) %((2 politics) OR (2 political)) and government %2f 18th century %((2 sources) or (21 sources))%22*.