Perhaps you should try some spelling variations:
multireference function » multireference wavefunctions, preference function, reference function
using multireference » using reference, using preference
function function » function functional, functions functional, function dysfunction
parallel using » parallel routing, parallel parking, parallel imaging
function https » functions https, fiction https

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