Perhaps you should try some spelling variations:
"programaaacion lineal codigo." » "programacion lineal codigo." (Expand Search), "programacion visual codigo." (Expand Search), "programaaaacion lineal codigo." (Expand Search), "programasaaacion lineal codigo." (Expand Search)
"programaacion de codigo." » "programacion de codigo." (Expand Search), "programacion del codigo." (Expand Search), "programacion en codigo." (Expand Search), "programaacion del codigo." (Expand Search), "programaacion al codigo." (Expand Search), "programaaacion de codigo." (Expand Search), "programasaacion de codigo." (Expand Search)
"program _ codigo." » "programa _ codigo." (Expand Search), "programas _ codigo." (Expand Search)

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"program _ codigo.\") OR (((\"programaaacion lineal codigo.\") OR (\"programaacion de codigo.\"))))~".
• Removing quotes may allow a broader search: (( program _ codigo. ) OR ((( programaaacion lineal codigo. ) OR ( programaacion de codigo. ))))~.
• Adding a wildcard symbol may retrieve word variants: (("program _ codigo.") OR ((("programaaacion lineal codigo.") OR ("programaacion de codigo."))))*.