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

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• Performing a fuzzy search may retrieve terms with similar spellings: (("modified multiobjective optimization algorithms") or ("modified based optimisation algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified multiobjective optimization algorithms") OR ("modified based optimisation algorithm"))*.
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