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

Try widening your search to All Fields.

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

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