Perhaps you should try some spelling variations:
"modified objective optimization algorithmss" » "modified objective optimization algorithms", "modified objective optimisation algorithm", "modified objective estimation algorithms", "modified multiobjective optimization algorithmss"
"modified adaptive quantization algorithms" » "modified adaptive estimation algorithms", "modified adaptive optimization algorithms", "modified adaptive ventilation algorithms", "modified passive quantization algorithms"

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