Perhaps you should try some spelling variations:
"modified orca approximation algorithm" » "modified orca approximation algorithms", "modified one approximation algorithm", "modified _ approximation algorithm", "modified time approximation algorithm"
"modified pose optimization algorithms" » "modified pose optimisation algorithm", "modified pose estimation algorithms", "modified pose estimation algorithm", "modified qoe optimization algorithms", "modified game optimization algorithms", "modified response optimization algorithms", "modified male optimization algorithms", "modified passive optimization algorithms"

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