Perhaps you should try some spelling variations:
"modified market optimization algorithm" » "modified market optimization algorithms", "modified market optimisation algorithm", "modified market estimation algorithm", "modified game optimization algorithm", "modified parameter optimization algorithm", "modified market capitalization algorithm", "modified male optimization algorithm"
"modified notion approximation algorithms" » "modified network approximation algorithms", "modified time approximation algorithms", "modified one approximation algorithms"

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified market optimization algorithm\") OR (\"modified notion approximation algorithms\"))~".
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