Perhaps you should try some spelling variations:
approximation algorithm » approximation algorithms
convolution algorithm » convolution algorithms, evolution algorithm, solution algorithm
one approximation » time approximation, _ approximation, rough approximations
mobile learning » machine learning
modified one » modified male, modified near, modified orca

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• Performing a fuzzy search may retrieve terms with similar spellings: (( mobile learning convolution algorithm ) or ( modified one approximation algorithm ))~.
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