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