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

• Removing quotes may allow a broader search: (( Cláusula federal en instrumentos internacionales sobre derechos humanos ) OR ( Cláusula federal en instrumento internacionales sobre derechos humanos )).

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