Perhaps you should try some spelling variations:
"ley 1537 de 2016" » "ley 1581 de 2016", "ley 1564 de 2016", "ley 1562 de 2016", "ley 153 de 2016", "ley 137 de 2016", "ley 1507 de 2016"
"ley 1438 de 2012" » "ley 1448 de 2012", "ley 1098 de 2012", "ley 1480 de 2012"
"ley 1437 de 2012" » "ley 1480 de 2012", "ley 1448 de 2012"
"ley 1437 de 2015" » "ley 1480 de 2015", "ley 1448 de 2015"
"ley 1030 de 2012" » "ley 100 de 2012", "ley 1010 de 2012", "ley 130 de 2012", "ley 1330 de 2012"
"ley 1090 de 2012" » "ley 100 de 2012", "ley 1098 de 2012", "ley 1480 de 2012"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((((("ley 1537 de 2016") or ("ley 1438 de 2012"))) or ((("ley 1437 de 2012") or ("ley 1437 de 2015"))))) or ((("ley 1030 de 2012") OR ("ley 1090 de 2012"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((((("ley 1537 de 2016") OR ("ley 1438 de 2012"))) OR ((("ley 1437 de 2012") OR ("ley 1437 de 2015"))))) OR ((("ley 1030 de 2012") OR ("ley 1090 de 2012")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"ley 1537 de 2016\") or (\"ley 1438 de 2012\"))) or (((\"ley 1437 de 2012\") or (\"ley 1437 de 2015\"))))) or (((\"ley 1030 de 2012\") OR (\"ley 1090 de 2012\"))))".
• Removing quotes may allow a broader search: (((((( ley 1537 de 2016 ) or ( ley 1438 de 2012 ))) or ((( ley 1437 de 2012 ) or ( ley 1437 de 2015 ))))) or ((( ley 1030 de 2012 ) OR ( ley 1090 de 2012 )))).
• Adding a wildcard symbol may retrieve word variants: (((((("ley 1537 de 2016") or ("ley 1438 de 2012"))) or ((("ley 1437 de 2012") or ("ley 1437 de 2015"))))) or ((("ley 1030 de 2012") OR ("ley 1090 de 2012"))))*.