Perhaps you should try some spelling variations:
"modified rough approximations algorithm" » "modified rough approximation algorithm", "modified rough approximation algorithms", "modified one approximation algorithm"
"modified based optimization algorithms" » "modified based optimisation algorithm", "modified based estimation algorithms", "modified based estimation algorithm", "modified game optimization algorithms", "modified market optimization algorithms", "modified qoe optimization algorithms", "modified male optimization algorithms"

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• Performing a fuzzy search may retrieve terms with similar spellings: (("modified based optimization algorithms") OR ("modified rough approximations algorithm"))~.
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