Perhaps you should try some spelling variations:
"modified multiobjective optimization algorithms" » "modified multiobjective optimisation algorithm", "modified multiobjective estimation algorithms", "modified multiobjective estimation algorithm"
"modified fire predators algorithm" » "modified fire predation algorithm", "modified marine predators algorithm", "modified seird predators algorithm", "modified bi1 predators algorithm", "modified male predators algorithm"

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• Performing a fuzzy search may retrieve terms with similar spellings: (("modified multiobjective optimization algorithms") OR ("modified fire predators algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified multiobjective optimization algorithms\") OR (\"modified fire predators algorithm\"))".
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