Perhaps you should try some spelling variations:
ley 1503 » ley 1563, ley 1523, ley 100
ley 1508 » ley 100, ley 1098, ley 1581
ley 1537 » ley 1437, ley 1581, ley 1438
1503 de » 1563 de, 1500 de, 103 de
de 2012 » de 2015
1508 de » 1500 de
ley 153 » ley 1563, ley 1523, ley 1253
de 2016 » de 2015

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((( ley 1503 de 2012 ) OR ( ley 1508 de 2012 ))) OR ( ((ley 153) OR (ley 1537)) de 2016 ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( ley 1503 de 2012 ) or ( ley 1508 de 2012 ))) or ( ((ley 153) OR (ley 1537)) de 2016 ))~".
• Adding a wildcard symbol may retrieve word variants: (((( ley 1503 de 2012 ) or ( ley 1508 de 2012 ))) or ( ((ley 153) OR (ley 1537)) de 2016 ))*.