Perhaps you should try some spelling variations:
"ley 1437 de 2015" » "ley 1480 de 2015", "ley 1448 de 2015"
"ley 1537 de 2012" » "ley 1581 de 2012", "ley 1438 de 2012", "ley 1564 de 2012", "ley 153 de 2012", "ley 137 de 2012", "ley 1507 de 2012"
"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 1507 de 2015"
"ley 1563 de 2016" » "ley 1564 de 2016", "ley 1562 de 2016", "ley 1581 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 2012") or ((("ley 1537 de 2015") OR ("ley 1437 de 2015"))))) or ("ley 1563 de 2016"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ley 1537 de 2012") OR ((("ley 1537 de 2015") OR ("ley 1437 de 2015"))))) OR ("ley 1563 de 2016")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"ley 1537 de 2012\") or (((\"ley 1537 de 2015\") OR (\"ley 1437 de 2015\"))))) or (\"ley 1563 de 2016\"))".
• Removing quotes may allow a broader search: (((( ley 1537 de 2012 ) or ((( ley 1537 de 2015 ) OR ( ley 1437 de 2015 ))))) or ( ley 1563 de 2016 )).
• Adding a wildcard symbol may retrieve word variants: (((("ley 1537 de 2012") or ((("ley 1537 de 2015") OR ("ley 1437 de 2015"))))) or ("ley 1563 de 2016"))*.