Perhaps you should try some spelling variations:
"ley 1437 de 2010-colombia" » "ley 1480 de 2010-colombia", "ley 1448 de 2010-colombia", "ley 1437 de 2012-colombia", "ley 1437 de 2011-colombia", "ley 1437 de 2017-colombia"
"ley 1443 de 2016-colombia" » "ley 1448 de 2016-colombia", "ley 1943 de 2016-colombia", "ley 1413 de 2016-colombia"
"ley 142 de 2015-colombia" » "ley 1341 de 2015-colombia", "ley 1480 de 2015-colombia", "ley 1448 de 2015-colombia"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("ley 142 de 2015-colombia") or ("ley 1437 de 2010-colombia"))) or ("ley 1443 de 2016-colombia"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ley 142 de 2015-colombia") OR ("ley 1437 de 2010-colombia"))) OR ("ley 1443 de 2016-colombia")).
• Removing quotes may allow a broader search: (((( ley 142 de 2015-colombia ) or ( ley 1437 de 2010-colombia ))) or ( ley 1443 de 2016-colombia )).
• Adding a wildcard symbol may retrieve word variants: (((("ley 142 de 2015-colombia") or ("ley 1437 de 2010-colombia"))) or ("ley 1443 de 2016-colombia"))*.