Perhaps you should try some spelling variations:
"modified market optimization algorithm" » "modified market optimization algorithms", "modified market optimisation algorithm", "modified market estimation algorithm", "modified game optimization algorithm", "modified market capitalization algorithm", "modified male optimization algorithm"
"modified parameter optimization algorithm" » "modified parameter optimization algorithms", "modified parameter optimisation algorithm", "modified parameter estimation algorithm", "modified parameters optimization algorithm"

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