Perhaps you should try some spelling variations:
"modified co convolution algorithms" » "modified co evolution algorithm", "modified co solution algorithm", "modified co evolution algorithms", "modified _ convolution algorithms", "modified df convolution algorithms", "modified orca convolution algorithms"
"modified notion approximation algorithms" » "modified network approximation algorithms", "modified time approximation algorithms", "modified one approximation algorithms"

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• Performing a fuzzy search may retrieve terms with similar spellings: (("modified notion approximation algorithms") or ("modified co convolution algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified notion approximation algorithms") OR ("modified co convolution algorithms"))*.
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