Perhaps you should try some spelling variations:
optimization algorithms » optimisation algorithm, estimation algorithms, estimation algorithm
solution algorithm » evolution algorithm, convolution algorithms, evolutionary algorithm
learning solution » learning convolution, learning emotion
df optimization » _ optimization, qoe optimization, _ optimisation
mobile learning » machine learning
modified df » modified _, modified adam, modified bi1

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• Performing a fuzzy search may retrieve terms with similar spellings: (( modified df optimization algorithms ) OR ( mobile learning solution algorithm ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( modified df optimization algorithms ) OR ( mobile learning solution algorithm ))".
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