Perhaps you should try some spelling variations:
"modified allocation optimization algorithmss" » "modified allocation optimization algorithms", "modified allocation optimisation algorithm", "modified allocation estimation algorithms", "modified location optimization algorithmss"
"modified parameter optimized algorithms" » "modified parameter optimized algorithm", "modified parameter optimizer algorithms", "modified parameter optimization algorithms"

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