Perhaps you should try some spelling variations:
"ley 155 de 1979" » "ley 15 de 1979" (Expand Search), "ley 1258 de 1979" (Expand Search), "ley 1564 de 1979" (Expand Search), "ley 155 de 1978" (Expand Search), "ley 155 de 1999" (Expand Search)
"ley 155 de 1989" » "ley 15 de 1989" (Expand Search), "ley 1258 de 1989" (Expand Search), "ley 1564 de 1989" (Expand Search), "ley 155 de 1999" (Expand Search), "ley 155 de 1980" (Expand Search), "ley 155 de 1988" (Expand Search)
"ley 155 ce 1989" » "ley 15 ce 1989" (Expand Search), "ley 1258 ce 1989" (Expand Search), "ley 1564 ce 1989" (Expand Search), "ley 155 ce 11969" (Expand Search)

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 155 de 1979") OR ((("ley 155 de 1989") OR ("ley 155 ce 1989"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"ley 155 de 1979\") OR (((\"ley 155 de 1989\") OR (\"ley 155 ce 1989\"))))".
• Removing quotes may allow a broader search: (( ley 155 de 1979 ) OR ((( ley 155 de 1989 ) OR ( ley 155 ce 1989 )))).
• Adding a wildcard symbol may retrieve word variants: (("ley 155 de 1979") OR ((("ley 155 de 1989") OR ("ley 155 ce 1989"))))*.