Perhaps you should try some spelling variations:
"modified multiobjective optimization algorithms" » "modified multiobjective optimisation algorithm", "modified multiobjective estimation algorithms", "modified multiobjective estimation algorithm"
"tower counting methods algorithm" » "tower nursing methods algorithm", "tower control methods algorithm", "power counting methods algorithm", "lower counting methods algorithm"

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