Perhaps you should try some spelling variations:
"derecho agrario espanol." » "derecho agrario espana.", "derecho bancario espanol.", "derecho sumario espanol."
"derecho estudio espana." » "derecho estudio estado.", "derecho estudio ana.", "derecho estudio elena."
"derecho judio espana." » "derecho justo espana.", "derecho claudio espana.", "derecho andino espana.", "derecho judios espana.", "derecho judio espanol.", "derecho radio espana."

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: (((("derecho judio espana.") OR ("derecho estudio espana."))) or ("derecho agrario espanol."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("derecho judio espana.") OR ("derecho estudio espana."))) OR ("derecho agrario espanol.")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"derecho judio espana.\") OR (\"derecho estudio espana.\"))) or (\"derecho agrario espanol.\"))".
• Removing quotes may allow a broader search: (((( derecho judio espana. ) OR ( derecho estudio espana. ))) or ( derecho agrario espanol. )).
• Adding a wildcard symbol may retrieve word variants: (((("derecho judio espana.") OR ("derecho estudio espana."))) or ("derecho agrario espanol."))*.