Perhaps you should try some spelling variations:
"programaacion lineal codigo." » "programacion lineal codigo." (Expand Search), "programacion visual codigo." (Expand Search), "programacion del codigo." (Expand Search), "programaaacion lineal codigo." (Expand Search), "programasaacion lineal codigo." (Expand Search)
"programaaacion de codigo." » "programacion de codigo." (Expand Search), "programacion del codigo." (Expand Search), "programacion en codigo." (Expand Search), "programaaacion del codigo." (Expand Search), "programaaacion al codigo." (Expand Search), "programaaaacion de codigo." (Expand Search), "programasaaacion 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 (((\"programaacion lineal codigo.\") OR (\"programaaacion de codigo.\"))))~".
• Removing quotes may allow a broader search: (( program _ codigo. ) OR ((( programaacion lineal codigo. ) OR ( programaaacion de codigo. ))))~.
• Adding a wildcard symbol may retrieve word variants: (("program _ codigo.") OR ((("programaacion lineal codigo.") OR ("programaaacion de codigo."))))*.