Perhaps you should try some spelling variations:
"modified orcadmplexity approximation algorithms" » "modified complexity approximation algorithms", "modified dorcadmplexity approximation algorithms", "modified orcaddmplexity approximation algorithms", "modified ohcadmplexity approximation algorithms"
"modified orca evolutionary algorithm" » "modified orca evolution algorithm", "modified orca solution algorithm", "modified dorca evolutionary algorithm", "modified orcad evolutionary algorithm", "modified ohca evolutionary algorithm"

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