Perhaps you should try some spelling variations:
"modified objective evolutionary algorithms" » "modified objective evolutionary algorithm", "modified objective evolution algorithm"
"modified multiobjective solution algorithm" » "modified multiobjective evolution algorithm", "modified multiobjective convolution algorithms", "modified multiobjective evolutionary algorithm"

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