You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( Cláusula federal e instrumentos internacionales sobre derechos humanos ) OR ( Cláusula federal e instrumentos internacional sobre derechos humanos ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( Cláusula federal e instrumentos internacionales sobre derechos humanos ) OR ( Cláusula federal e instrumentos internacional sobre derechos humanos ))".
• Adding a wildcard symbol may retrieve word variants: (( Cláusula federal e instrumentos internacionales sobre derechos humanos ) OR ( Cláusula federal e instrumentos internacional sobre derechos humanos ))*.

Perhaps you should try some spelling variations:
instrumentos internacionales » crimenes internacionales (Expand Search), contratos internacionales (Expand Search)
instrumentos internacional » instrumento internacional (Expand Search), instrumentos internacionais (Expand Search), instruments internacionals (Expand Search)
internacionales sobre » internacionales de (Expand Search), internacionales en (Expand Search), internacionales y (Expand Search)
clausula federal » clausula general (Expand Search), clausura general (Expand Search), clausula penal (Expand Search)
e instrumentos » los instrumentos (Expand Search), un instrumento (Expand Search)
federal e » federal de (Expand Search), federal en (Expand Search), federal _ (Expand Search)