Perhaps you should try some spelling variations:
"ley 19437 de 2010-colombia" » "ley 1437 de 2010-colombia", "ley 1943 de 2010-colombia", "ley 1.437 de 2010-colombia", "ley 19437 de 2015-colombia", "ley 19437 de 2012-colombia", "ley 19437 de 2011-colombia"
"ley 1427 de 2010-colombia" » "ley 1437 de 2010-colombia", "ley 142 de 2010-colombia", "ley 1429 de 2010-colombia", "ley 1427 de 2015-colombia", "ley 1427 de 2012-colombia", "ley 1427 de 2011-colombia", "ley 1421 de 2010-colombia"
"ley 143 de 2016-colombia" » "ley 1437 de 2016-colombia", "ley 1438 de 2016-colombia", "ley 1943 de 2016-colombia", "ley 143 de 2015-colombia", "ley 1443 de 2016-colombia"

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("ley 19437 de 2010-colombia") or ("ley 1427 de 2010-colombia"))) or ("ley 143 de 2016-colombia"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ley 19437 de 2010-colombia") OR ("ley 1427 de 2010-colombia"))) OR ("ley 143 de 2016-colombia")).
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• Adding a wildcard symbol may retrieve word variants: (((("ley 19437 de 2010-colombia") or ("ley 1427 de 2010-colombia"))) or ("ley 143 de 2016-colombia"))*.