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