Perhaps you should try some spelling variations:
"estudios autonomica y federales ;" » "estudios autonomicos y federales ;" (Expand Search), "d'estudis autonomics y federales ;" (Expand Search), "estudios economico y federales ;" (Expand Search), "estudios autonomia y federales ;" (Expand Search), "estudios autonomica en federales ;" (Expand Search), "estudios autonomica y federalismo ;" (Expand Search), "estudios autonomica _ federalism ;" (Expand Search)
"estado autonomico y federales ;" » "estado autonomico y federalismo ;" (Expand Search), "estado autonomico _ federalism ;" (Expand Search), "estado autonomia y federales ;" (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: (("estudios autonomica y federales ;") OR ("estado autonomico y federales ;"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"estudios autonomica y federales ;\") OR (\"estado autonomico y federales ;\"))".
• Removing quotes may allow a broader search: (( estudios autonomica y federales ; ) OR ( estado autonomico y federales ; )).
• Adding a wildcard symbol may retrieve word variants: (("estudios autonomica y federales ;") OR ("estado autonomico y federales ;"))*.