Perhaps you should try some spelling variations:
"politica del derecho." » "politica de derecho.", "politica dde derecho."
"politica el derecho." » "politica de derecho."
"politica en derecho." » "politica de derecho.", "politica al derecho."
"politica y derecho." » "politica de derecho."

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