Perhaps you should try some spelling variations:
archivo historico » archive history, archivs history, archiving historical
archiving history » archival history, archives history, living history
defense nacional » defensa nacional, defense national, defecto nacional
archival study » archival studies, archival history
a defense » a defence, _ defense
de a » de la, der a, des a

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: ((((archivo historico) OR (archivio storico))) OR (((archiving history) OR (archival study)))) de a defense nacional (mexico).
• Adding a wildcard symbol may retrieve word variants: ((((archivo historico) or (archivio storico))) or (((archiving history) or (archival study)))) de a defense nacional (mexico)*.