Perhaps you should try some spelling variations:
functionaries function » functionals function, functions function, function dysfunction
using functionaries » using functionalized, using functional, islam functionaries
parallel codes » parallel code, parallel cores, parallel models
function https » functions https, fiction https
codes using » code using, nodes using, modes using

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