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