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
defense nacional » defensa nacional, defense national, defecto nacional
archival study » archival studies
der a » der _, der 2, der 1
de a » de la, des a, de m

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