Perhaps you should try some spelling variations:
"risk estimation algorithms" » "risk optimization algorithms", "risk optimisation algorithm", "risk approximation algorithms", "pose estimation algorithms"
"_ optimizer algorithms" » "_ optimized algorithms", "_ optimized algorithm", "_ optimization algorithms", "_ optimize algorithms", "_ optimise algorithms"
"dose estimation algorithm" » "pose estimation algorithm", "cover estimations algorithm", "pulses estimation algorithm"

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("risk estimation algorithms") or ("dose estimation algorithm"))) or ("_ optimizer algorithms"))~.
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