Perhaps you should try some spelling variations:
"modified mild convolution algorithms" » "modified mild evolution algorithm", "modified mild solution algorithm", "modified dilated convolution algorithms", "modified male convolution algorithms", "modified seird convolution algorithms", "modified bi1 convolution algorithms"
"modified coverage approximation algorithms" » "modified average approximation algorithms"

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified mild convolution algorithms\") OR (\"modified coverage approximation algorithms\"))~".
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