Perhaps you should try some spelling variations:
"modified invasive estimation algorithms" » "modified invasive estimation algorithm", "modified invasive optimization algorithms", "modified invasive optimisation algorithm", "modified invasive ventilation algorithms", "modified passive estimation algorithms"
"modified counting methods algorithm" » "modified caging methods algorithm", "modified nursing methods algorithm", "modified control methods algorithm"

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• Removing quotes may allow a broader search: (( modified counting methods algorithm ) OR ( modified invasive estimation algorithms ))~.
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