Perhaps you should try some spelling variations:
"modified multiobjective optimization algorithms" » "modified multiobjective estimation algorithms", "modified multiobjective estimation algorithm", "modified multiobjective optimized algorithms"
"modified write optimisation algorithm" » "modified write estimation algorithm", "modified write estimation algorithms"

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• Performing a fuzzy search may retrieve terms with similar spellings: (("modified multiobjective optimization algorithms") OR ("modified write optimisation algorithm"))~.
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• Removing quotes may allow a broader search: (( modified multiobjective optimization algorithms ) OR ( modified write optimisation algorithm ))*.