Perhaps you should try some spelling variations:
"ley 1581 de 2015" » "ley 1341 de 2015"
"ley 1480 de 2012" » "ley 100 de 2012"
"ley 1379 de 2012" » "ley 1341 de 2012", "ley 1819 de 2012", "ley 1437 de 2012", "ley 14379 de 2012", "ley 15379 de 2012", "ley 1359 de 2012", "ley 1079 de 2012", "ley 1979 de 2012", "ley 1279 de 2012"
"ley 1377 de 2016" » "ley 1341 de 2016", "ley 1437 de 2016", "ley 1340 de 2016", "ley 14377 de 2016", "ley 15377 de 2016", "ley 1357 de 2016", "ley 1477 de 2016"
"ley 137 de 2012" » "ley 1437 de 2012", "ley 1537 de 2012", "ley 135 de 2012", "ley 137 del 2012", "ley 1376 de 2012"

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 1581 de 2015") OR ("ley 1480 de 2012"))) OR ((((("ley 137 de 2012") OR ("ley 1379 de 2012"))) OR ("ley 1377 de 2016"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"ley 1581 de 2015\") or (\"ley 1480 de 2012\"))) or (((((\"ley 137 de 2012\") OR (\"ley 1379 de 2012\"))) or (\"ley 1377 de 2016\"))))~".
• Removing quotes may allow a broader search: (((( ley 1581 de 2015 ) or ( ley 1480 de 2012 ))) or ((((( ley 137 de 2012 ) OR ( ley 1379 de 2012 ))) or ( ley 1377 de 2016 ))))~.
• Adding a wildcard symbol may retrieve word variants: (((("ley 1581 de 2015") or ("ley 1480 de 2012"))) or ((((("ley 137 de 2012") OR ("ley 1379 de 2012"))) or ("ley 1377 de 2016"))))*.