Perhaps you should try some spelling variations:
"modified a classification algorithm" » "modified _ classification algorithm", "modified gas classification algorithm", "modified image classification algorithm", "modified df classification algorithm", "modified adam classification algorithm"
"modified adamdamdamverage approximation algorithms" » "modified _damdamdamverage approximation algorithms", "modified dfdamdamdamverage approximation algorithms", "modified adamdamdamdamverage approximation algorithms"

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