Perhaps you should try some spelling variations:
"ley 1581 de 2012" » "ley 1341 de 2012", "ley 1581 de 2015"
"ley 1480 de 2012" » "ley 100 de 2012", "ley 1480 de 2015"
"ley 1437 de 2016" » "ley 1448 de 2016", "ley 1437 de 2015"
"ley 1030 de 2012" » "ley 100 de 2012", "ley 1010 de 2012", "ley 130 de 2012", "ley 1030 de 2015", "ley 1330 de 2012"
"ley 1090 de 2012" » "ley 100 de 2012", "ley 1098 de 2012", "ley 1090 de 2015"
"ley 1564 de 2012" » "ley 1564 de 2015"

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: (((((((("ley 1564 de 2012") or ("ley 1581 de 2012"))) or ("ley 1480 de 2012"))) or ("ley 1437 de 2016"))) or ((("ley 1030 de 2012") or ("ley 1090 de 2012"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((((((("ley 1564 de 2012") OR ("ley 1581 de 2012"))) OR ("ley 1480 de 2012"))) OR ("ley 1437 de 2016"))) OR ((("ley 1030 de 2012") OR ("ley 1090 de 2012")))).
• Removing quotes may allow a broader search: (((((((( ley 1564 de 2012 ) or ( ley 1581 de 2012 ))) or ( ley 1480 de 2012 ))) or ( ley 1437 de 2016 ))) or ((( ley 1030 de 2012 ) or ( ley 1090 de 2012 )))).
• Adding a wildcard symbol may retrieve word variants: (((((((("ley 1564 de 2012") or ("ley 1581 de 2012"))) or ("ley 1480 de 2012"))) or ("ley 1437 de 2016"))) or ((("ley 1030 de 2012") or ("ley 1090 de 2012"))))*.