Perhaps you should try some spelling variations:
28 september » 30 september, 31 september
cedulas de » cedula de, cedulas y
1 1784 » 4 1784, 1 1783, 1 1794
1 1789 » 4 1789, 1 1799
de 20 » le 20, de 10, de 24
20 28 » 26 28, 20 22, 20 23

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: spain / cedulas de 20 28 september ((1 1784) OR (1 1789)).
• Adding a wildcard symbol may retrieve word variants: spain / cedulas de 20 28 september ((1 1784) or (1 1789))*.