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