Perhaps you should try some spelling variations:
"programacion lineal codigo." » "programacion visual codigo." (Expand Search)
"programacion del codigo." » "programacion de codigo." (Expand Search), "programacion en codigo." (Expand Search), "programacion para codigo." (Expand Search)
"programas _ codigo." » "programa _ codigo." (Expand Search)

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("programas _ codigo.") OR ((("programacion lineal codigo.") OR ("programacion del codigo."))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"programas _ codigo.\") OR (((\"programacion lineal codigo.\") OR (\"programacion del codigo.\"))))*".
• Removing quotes may allow a broader search: (( programas _ codigo. ) OR ((( programacion lineal codigo. ) OR ( programacion del codigo. ))))*.