Perhaps you should try some spelling variations:
"path una formulacion" » "path la formulacion", "path de formulacion", "path su formulacion", "pat una formulacion"
"paths una formulacion" » "paths la formulacion", "paths de formulacion", "paths su formulacion", "pazos una formulacion", "pats una formulacion"
"path y formulacion" » "path la formulacion", "path de formulacion", "path y formacion", "pat y formulacion"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("path una formulacion") OR ("paths una formulacion"))) OR ("path y formulacion"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"path una formulacion\") OR (\"paths una formulacion\"))) OR (\"path y formulacion\"))*".
• Removing quotes may allow a broader search: (((( path una formulacion ) OR ( paths una formulacion ))) OR ( path y formulacion ))*.