Perhaps you should try some spelling variations:
"modified parameter optimization algorithms" » "modified parameter optimisation algorithm", "modified parameter estimation algorithms", "modified parameter estimation algorithm", "modified parameters optimization algorithms"
"modified objective optimized algorithm" » "modified objective optimal algorithm", "modified objective optimization algorithm", "modified objective optimized algorithms", "modified objective optimizer algorithms"

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• Performing a fuzzy search may retrieve terms with similar spellings: (("modified parameter optimization algorithms") or ("modified objective optimized algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified parameter optimization algorithms") OR ("modified objective optimized algorithm"))*.
• Removing quotes may allow a broader search: (( modified parameter optimization algorithms ) or ( modified objective optimized algorithm ))*.