Perhaps you should try some spelling variations:
functionaries function » functionals function, functions function, function dysfunction
parallel optimization » parameter optimization, parameters optimization, parallel simulation
problem functionaries » problem functionals, problems dictionaries, problem functional
optimization problem » optimization problems
function https » functions https, fiction https

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