Perhaps you should try some spelling variations:
"ley 1537 de 2015" » "ley 1581 de 2015", "ley 1438 de 2015", "ley 1564 de 2015", "ley 153 de 2015", "ley 137 de 2015", "ley 1530 de 2015"
"ley 1507 de 2015" » "ley 1607 de 2015", "ley 1503 de 2015", "ley 1508 de 2015", "ley 1500 de 2015", "ley 1407 de 2015"
"ley 1098 de 2012" » "ley 100 de 2012", "ley 1098 de 2016"
"ley 1437 de 2012" » "ley 1480 de 2012", "ley 1448 de 2012", "ley 1437 de 2016"
"ley 1030 de 2012" » "ley 100 de 2012", "ley 1090 de 2012", "ley 1010 de 2012", "ley 1030 de 2016"

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 2015") OR ("ley 1507 de 2015"))) or ("ley 1098 de 2012"))) or ("ley 1437 de 2012"))) or ("ley 1030 de 2012"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((((((("ley 1537 de 2015") OR ("ley 1507 de 2015"))) OR ("ley 1098 de 2012"))) OR ("ley 1437 de 2012"))) OR ("ley 1030 de 2012")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((((\"ley 1537 de 2015\") OR (\"ley 1507 de 2015\"))) or (\"ley 1098 de 2012\"))) or (\"ley 1437 de 2012\"))) or (\"ley 1030 de 2012\"))".
• Removing quotes may allow a broader search: (((((((( ley 1537 de 2015 ) OR ( ley 1507 de 2015 ))) or ( ley 1098 de 2012 ))) or ( ley 1437 de 2012 ))) or ( ley 1030 de 2012 )).
• Adding a wildcard symbol may retrieve word variants: (((((((("ley 1537 de 2015") OR ("ley 1507 de 2015"))) or ("ley 1098 de 2012"))) or ("ley 1437 de 2012"))) or ("ley 1030 de 2012"))*.