Perhaps you should try some spelling variations:
centrales administrativas » controles administrativos, generales administrativos, contratos administrativos
general administrative » general administracion, control administrativo, centro administrativo
la economica » la economia, _ economica, zona economica
en derechos » de derechos, los derechos
en derecho » al derecho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((centrales administrativas) or (general administrative)) la economica ((en derechos) or (en derecho))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((centrales administrativas) OR (general administrative)) la economica ((en derechos) OR (en derecho)).
• Adding a wildcard symbol may retrieve word variants: ((centrales administrativas) or (general administrative)) la economica ((en derechos) or (en derecho))*.

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