Perhaps you should try some spelling variations:
autoridades administrativas » actividades administrativas, actividad administrativa
administrativas impacto » administrativa impactos, administrativo impacto, administrativas aspectos
administrative appeal » administrativa actual, administrativa area, administrativa especial
administrative area » administrativa area, administrativas area, administrative career
impacto ecologico » impacto tecnologico, impacto economico, impacto psicologico
ecologico del » ecologicos del, ecologico de, ecologica del
economico del » economico de
del derechos » de derechos, el derechos, en derechos

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( autoridades administrativas impacto ecologico del derecho ) or ( gestion ((administrative area) OR (administrative appeal)) economico del derechos ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( autoridades administrativas impacto ecologico del derecho ) OR ( gestion ((administrative area) OR (administrative appeal)) economico del derechos )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( autoridades administrativas impacto ecologico del derecho ) or ( gestion ((administrative area) OR (administrative appeal)) economico del derechos ))".
• Adding a wildcard symbol may retrieve word variants: (( autoridades administrativas impacto ecologico del derecho ) or ( gestion ((administrative area) OR (administrative appeal)) economico del derechos ))*.