Perhaps you should try some spelling variations:
"modified parameter estimation algorithmss" » "modified parameter estimation algorithms", "modified parameter estimation algorithm", "modified parameter optimization algorithms", "modified parameter estimates algorithmss", "modified parameter optimization algorithmss"
"modified objective predation algorithm" » "modified objective allocation algorithm", "modified objective predators algorithm", "modified objective estimation algorithm"

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• Performing a fuzzy search may retrieve terms with similar spellings: (("modified objective predation algorithm") OR ("modified parameter estimation algorithmss"))~.
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• Removing quotes may allow a broader search: (( modified objective predation algorithm ) OR ( modified parameter estimation algorithmss ))*.