Perhaps you should try some spelling variations:
function function » function functional, functions functional, function dysfunction
parallel process » parallel processes, parallel processing, parallel processors
drupal function » dual function, adrenal function, renal function
process drupal » process drug
function https » functions https, fiction https

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• Performing a fuzzy search may retrieve terms with similar spellings: parallel process drupal function function https~.
• Adding a wildcard symbol may retrieve word variants: parallel process drupal function function https*.