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