Perhaps you should try some spelling variations:
"biblioteca basica la administracion publica" » "biblioteca basica la administracio publica" (Expand Search), "biblioteca basica la administracion local" (Expand Search), "biblioteca basica i administracio publica" (Expand Search)
"biblioteca basica la administracionn local" » "biblioteca basica la administracion local" (Expand Search), "biblioteca basica la administracio local" (Expand Search), "biblioteca basica de administracion local" (Expand Search), "biblioteca basica i administracio local" (Expand Search), "biblioteca basica i administracion local" (Expand Search)

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• Performing a fuzzy search may retrieve terms with similar spellings: (("biblioteca basica la administracionn local") OR ("biblioteca basica la administracion publica"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"biblioteca basica la administracionn local\") OR (\"biblioteca basica la administracion publica\"))".
• Removing quotes may allow a broader search: (( biblioteca basica la administracionn local ) OR ( biblioteca basica la administracion publica )).
• Adding a wildcard symbol may retrieve word variants: (("biblioteca basica la administracionn local") OR ("biblioteca basica la administracion publica"))*.