Perhaps you should try some spelling variations:
archiving historical » archiving history, etching historical, accessing historical
archivs history » archives history, archive history, archival history
la defensa » a defense
la depense » les depenses
la defense » a defense, _ defense

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: ((archiving historical) OR (archivs history)) de ((((la defensa) OR (la depense))) OR (la defense)) nacional (mexico).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((archiving historical) or (archivs history)) de ((((la defensa) OR (la depense))) or (la defense)) nacional (mexico)".
• Adding a wildcard symbol may retrieve word variants: ((archiving historical) or (archivs history)) de ((((la defensa) OR (la depense))) or (la defense)) nacional (mexico)*.