Perhaps you should try some spelling variations:
"programacion lineal codigo." » "programacion visual codigo." (Expand Search), "programacion del codigo." (Expand Search), "programaacion lineal codigo." (Expand Search), "programasacion lineal codigo." (Expand Search)
"programasaado a codigo." » "programasaado al codigo." (Expand Search), "programasaado el codigo." (Expand Search), "programaasaado a codigo." (Expand Search), "programasasaado a codigo." (Expand Search), "programado a codigo." (Expand Search), "programando a codigo." (Expand Search)
"program _ codigo." » "programa _ codigo." (Expand Search), "programas _ codigo." (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: (((("program _ codigo.") OR ("programacion lineal codigo."))) OR ("programasaado a codigo."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"program _ codigo.\") OR (\"programacion lineal codigo.\"))) OR (\"programasaado a codigo.\"))".
• Removing quotes may allow a broader search: (((( program _ codigo. ) OR ( programacion lineal codigo. ))) OR ( programasaado a codigo. )).
• Adding a wildcard symbol may retrieve word variants: (((("program _ codigo.") OR ("programacion lineal codigo."))) OR ("programasaado a codigo."))*.