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