Perhaps you should try some spelling variations:
"modified time approximation algorithm" » "modified time approximation algorithms", "modified one approximation algorithm", "modified _ approximation algorithm", "modified male approximation algorithm"
"modified bi1 optimisation algorithm" » "modified bi1 optimization algorithms", "modified bi1 estimation algorithm", "modified bi1 estimation algorithms", "modified _ optimisation algorithm", "modified _ optimization algorithm", "modified qoe optimization algorithm"

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