Perhaps you should try some spelling variations:
"modified neardamdaptive quantization algorithm" » "modified adaptive quantization algorithm", "modified neardamdaptive estimation algorithm"
"modified df approximation algorithms" » "modified _ approximation algorithms", "modified one approximation algorithms", "modified time approximation algorithms", "modified adam approximation algorithms", "modified bi1 approximation algorithms"

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• Removing quotes may allow a broader search: (( modified neardamdaptive quantization algorithm ) OR ( modified df approximation algorithms ))~.
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