Perhaps you should try some spelling variations:
"modified objective optimisation algorithm" » "modified objective optimization algorithm", "modified multiobjective optimization algorithm", "modified objective optimization algorithms", "modified objective estimation algorithm", "modified objective estimation algorithms"
"modified based predators algorithm" » "modified based predation algorithm", "modified based operators algorithm", "modified male predators algorithm"

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• Performing a fuzzy search may retrieve terms with similar spellings: (("modified objective optimisation algorithm") OR ("modified based predators algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified objective optimisation algorithm\") OR (\"modified based predators algorithm\"))*".
• Removing quotes may allow a broader search: (( modified objective optimisation algorithm ) OR ( modified based predators algorithm ))*.