Perhaps you should try some spelling variations:
"modified adaptive ventilation algorithms" » "modified adaptive estimation algorithms", "modified adaptive estimation algorithm", "modified adaptive convolution algorithms", "modified adaptive quantization algorithms", "modified invasive ventilation algorithms"
"modified passive evolution algorithms" » "modified passive evolution algorithm", "modified passive convolution algorithms", "modified passive solution algorithm"

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• Performing a fuzzy search may retrieve terms with similar spellings: (("modified passive evolution algorithms") or ("modified adaptive ventilation algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified passive evolution algorithms") OR ("modified adaptive ventilation algorithms")).
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