Perhaps you should try some spelling variations:
approximation algorithm » approximation algorithms
evolution algorithm » solution algorithm, evolutionary algorithm, convolution algorithms
time approximation » one approximation, _ approximation
based evolution » based evaluation, based solutions, sales evolution
modified based » modified male
modified time » modified bi1, modified male

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• Performing a fuzzy search may retrieve terms with similar spellings: (( modified based evolution algorithm ) or ( modified time approximation algorithm ))~.
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