Perhaps you should try some spelling variations:
"biblioteconomia la administracion local ;" » "biblioteconomia la administracio local ;" (Expand Search), "biblioteconomia i administracio local ;" (Expand Search)
"biblioteconomia dret administratiu local ;" » "biblioteconomia dret administracio local ;" (Expand Search)
"biblioteconomia de administracion cultural ;" » "biblioteconomia i administracio cultural ;" (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: (((("biblioteconomia de administracion cultural ;") OR ("biblioteconomia la administracion local ;"))) OR ("biblioteconomia dret administratiu local ;"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"biblioteconomia de administracion cultural ;\") OR (\"biblioteconomia la administracion local ;\"))) OR (\"biblioteconomia dret administratiu local ;\"))".
• Removing quotes may allow a broader search: (((( biblioteconomia de administracion cultural ; ) OR ( biblioteconomia la administracion local ; ))) OR ( biblioteconomia dret administratiu local ; )).
• Adding a wildcard symbol may retrieve word variants: (((("biblioteconomia de administracion cultural ;") OR ("biblioteconomia la administracion local ;"))) OR ("biblioteconomia dret administratiu local ;"))*.