Perhaps you should try some spelling variations:
"biblioteconomia de administracion local ;" » "biblioteconomia de administracio local ;" (Expand Search), "biblioteconomia i administracio local ;" (Expand Search)
"biblioteconomia la administracion cultural ;" » "biblioteconomia i administracio cultural ;" (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: "((\"biblioteconomia la administracion cultural ;\") OR (\"biblioteconomia de administracion local ;\"))~".
• Removing quotes may allow a broader search: (( biblioteconomia la administracion cultural ; ) OR ( biblioteconomia de administracion local ; ))~.
• Adding a wildcard symbol may retrieve word variants: (("biblioteconomia la administracion cultural ;") OR ("biblioteconomia de administracion local ;"))*.