Perhaps you should try some spelling variations:
functionaries function » functionals function, functions function, function dysfunction
using functionaries » using functionalized, using functional, islam functionaries
parallel problem » parallel program, parallel programs, parallel robots
function https » functions https, fiction https
problem using » problems using

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