Perhaps you should try some spelling variations:
archivo historico » archive history, archivs history, archiving historical
archiving history » archives history, living history, searching history
archival history » archives history, parochial history, archival study
defense nacional » defensa nacional, defecto nacional, defense regional
defense national » defensa nacional, defense natural, defense regional
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 history)))) de a ((defense nacional) OR (defense national)) (mexico).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((archivo historico) or (archivio storico))) or (((archiving history) or (archival history)))) de a ((defense nacional) OR (defense national)) (mexico)".
• Adding a wildcard symbol may retrieve word variants: ((((archivo historico) or (archivio storico))) or (((archiving history) or (archival history)))) de a ((defense nacional) OR (defense national)) (mexico)*.