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