Perhaps you should try some spelling variations:
"modified passive quantization algorithm" » "modified passive estimation algorithm", "modified adaptive quantization algorithm"
"modified allocation optimized algorithms" » "modified allocation optimization algorithms", "modified allocation optimized algorithm", "modified allocation optimizer algorithms"

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