Perhaps you should try some spelling variations:
"modified df convolutional algorithms" » "modified df convolution algorithms", "modified df evolution algorithm", "modified df evolutionary algorithm", "modified d convolutional algorithms", "modified deep convolutional algorithms", "modified _ convolutional algorithms", "modified bi1 convolutional algorithms"
"modified adam approximation algorithms" » "modified _ approximation algorithms", "modified one approximation algorithms", "modified time approximation algorithms", "modified near approximation algorithms"

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified df convolutional algorithms\") OR (\"modified adam approximation algorithms\"))~".
• Removing quotes may allow a broader search: (( modified df convolutional algorithms ) OR ( modified adam approximation algorithms ))~.
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