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

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"biblioteca basica la administracio publica\") OR (\"biblioteca basica dret administratiu local\"))~".
• Removing quotes may allow a broader search: (( biblioteca basica la administracio publica ) OR ( biblioteca basica dret administratiu local ))~.
• Adding a wildcard symbol may retrieve word variants: (("biblioteca basica la administracio publica") OR ("biblioteca basica dret administratiu local"))*.