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

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