Perhaps you should try some spelling variations:
"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"
"modified notion optimized algorithm" » "modified notion optimized algorithms", "modified notion optimizer algorithms"

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified notion optimized algorithm") OR ("modified based optimization algorithms"))~.
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