Perhaps you should try some spelling variations:
"ley 1437 de 2012" » "ley 1480 de 2012", "ley 1448 de 2012", "ley 1437 de 2016"
"ley 1355 de 2012" » "ley 1955 de 2012", "ley 115 de 2012", "ley 1340 de 2012", "ley 1355 de 2016"
"ley 137 de 2012" » "ley 1537 de 2012", "ley 1379 de 2012", "ley 135 de 2012", "ley 137 de 2016", "ley 1377 de 2012", "ley 137 del 2012", "ley 1376 de 2012"
"ley 137 de 2015" » "ley 1537 de 2015", "ley 1379 de 2015", "ley 135 de 2015", "ley 1377 de 2015", "ley 137 del 2015", "ley 1376 de 2015"
"ley 1341 de 2012" » "ley 1341 de 2016"

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 137 de 2012") OR ("ley 137 de 2015"))) or ((("ley 1437 de 2012") or ((("ley 1355 de 2012") or ("ley 1341 de 2012"))))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ley 137 de 2012") OR ("ley 137 de 2015"))) OR ((("ley 1437 de 2012") OR ((("ley 1355 de 2012") OR ("ley 1341 de 2012")))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"ley 137 de 2012\") OR (\"ley 137 de 2015\"))) or (((\"ley 1437 de 2012\") or (((\"ley 1355 de 2012\") or (\"ley 1341 de 2012\"))))))".
• Removing quotes may allow a broader search: (((( ley 137 de 2012 ) OR ( ley 137 de 2015 ))) or ((( ley 1437 de 2012 ) or ((( ley 1355 de 2012 ) or ( ley 1341 de 2012 )))))).
• Adding a wildcard symbol may retrieve word variants: (((("ley 137 de 2012") OR ("ley 137 de 2015"))) or ((("ley 1437 de 2012") or ((("ley 1355 de 2012") or ("ley 1341 de 2012"))))))*.