Perhaps you should try some spelling variations:
"modified multiobjective optimization algorithms" » "modified multiobjective optimisation algorithm", "modified multiobjective estimation algorithms", "modified multiobjective estimation algorithm"
"modified global solution algorithm" » "modified global evolution algorithm", "modified global convolution algorithms", "modified global evolutionary algorithm", "modified global solutions algorithm", "modified nodal solution algorithm"

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified global solution algorithm\") OR (\"modified multiobjective optimization algorithms\"))~".
• Removing quotes may allow a broader search: (( modified global solution algorithm ) OR ( modified multiobjective optimization algorithms ))~.
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