Perhaps you should try some spelling variations:
"modified multiobjective optimization algorithm" » "modified multiobjective optimization algorithms", "modified multiobjective optimisation algorithm", "modified multiobjective estimation algorithms"
"modified fire estimation algorithm" » "modified pose estimation algorithm", "modified risk estimation algorithm", "modified sphere estimation algorithm", "modified seird estimation algorithm", "modified bi1 estimation algorithm", "modified male estimation algorithm"

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