Perhaps you should try some spelling variations:
"binary bi level optimization algorithm" » "binary bi global optimization algorithm" (Expand Search), "binary bi based optimization algorithm" (Expand Search)
"binary heads process optimization algorithm" » "binary beads process optimization algorithm" (Expand Search)

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