Perhaps you should try some spelling variations:
"programasa a codigo." » "programas y codigo." (Expand Search), "programas para codigo." (Expand Search), "programa para codigo." (Expand Search), "programasa al codigo." (Expand Search), "programasa el codigo." (Expand Search), "programaa a codigo." (Expand Search)
"programas _ codigo." » "programa _ codigo." (Expand Search)
"programasa parallel codigo." » "programaa parallel 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: "((\"programas _ codigo.\") OR (((\"programasa parallel codigo.\") OR (\"programasa a codigo.\"))))~".
• Removing quotes may allow a broader search: (( programas _ codigo. ) OR ((( programasa parallel codigo. ) OR ( programasa a codigo. ))))~.
• Adding a wildcard symbol may retrieve word variants: (("programas _ codigo.") OR ((("programasa parallel codigo.") OR ("programasa a codigo."))))*.