Perhaps you should try some spelling variations:
"binary step process optimization algorithm" » "binary step model optimization algorithm" (Expand Search), "binary stem process optimization algorithm" (Expand Search)
"binary mask codon optimization algorithm" » "binary mask wolf optimization algorithm" (Expand Search), "binary image codon optimization algorithm" (Expand Search)

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"binary step process optimization algorithm\") OR (\"binary mask codon optimization algorithm\"))~".
• Removing quotes may allow a broader search: (( binary step process optimization algorithm ) OR ( binary mask codon optimization algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("binary step process optimization algorithm") OR ("binary mask codon optimization algorithm"))*.