Perhaps you should try some spelling variations:
"modified legacy applications algorithms" » "modified legacy approximation algorithms", "modified device applications algorithms", "modified research applications algorithms", "modified finance applications algorithms"
"modified adaptive quantization algorithm" » "modified adaptive estimation algorithm", "modified adaptive ventilation algorithm", "modified passive quantization algorithm"

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified legacy applications algorithms\") OR (\"modified adaptive quantization algorithm\"))~".
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