Perhaps you should try some spelling variations:
"la formalizacion previa" » "la comunicacion previa" (Expand Search), "la formalizacion del" (Expand Search), "la formalizacion minera" (Expand Search), "la fiscalizacion previa" (Expand Search), "la formulacion previa" (Expand Search), "la realizacion previa" (Expand Search)
"la normalizacion del" » "la actualizacion del" (Expand Search), "la globalizacion del" (Expand Search), "la fiscalizacion del" (Expand Search), "la realizacion del" (Expand Search)
"la formalizacion de" » "la fiscalizacion de" (Expand Search), "la formulacion de" (Expand Search), "la realizacion de" (Expand Search), "la normalizacion de" (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: (("la formalizacion previa") OR ((("la formalizacion de") OR ("la normalizacion del"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"la formalizacion previa\") OR (((\"la formalizacion de\") OR (\"la normalizacion del\"))))".
• Removing quotes may allow a broader search: (( la formalizacion previa ) OR ((( la formalizacion de ) OR ( la normalizacion del )))).
• Adding a wildcard symbol may retrieve word variants: (("la formalizacion previa") OR ((("la formalizacion de") OR ("la normalizacion del"))))*.