Perhaps you should try some spelling variations:
"programable plc codigo." » "programar plc codigo." (Expand Search), "programable al codigo." (Expand Search), "programable el 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 ddel codigo." » "programa del codigo." (Expand Search), "programa de codigo." (Expand Search), "programas del codigo." (Expand Search), "programa el codigo." (Expand Search)

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• Performing a fuzzy search may retrieve terms with similar spellings: (("programable plc codigo.") OR ((("programacion a codigo.") OR ("programa ddel codigo."))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"programable plc codigo.\") OR (((\"programacion a codigo.\") OR (\"programa ddel codigo.\"))))".
• Removing quotes may allow a broader search: (( programable plc codigo. ) OR ((( programacion a codigo. ) OR ( programa ddel codigo. )))).
• Adding a wildcard symbol may retrieve word variants: (("programable plc codigo.") OR ((("programacion a codigo.") OR ("programa ddel codigo."))))*.