Perhaps you should try some spelling variations:
"modified multiobjective estimation algorithm" » "modified multiobjective optimization algorithm"
"modified quantile optimizer algorithms" » "modified quantile optimized algorithms", "modified quantile optimized algorithm", "modified quantile optimization algorithms", "modified adaptive optimizer algorithms"

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified multiobjective estimation algorithm") OR ("modified quantile optimizer algorithms"))*.
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