Perhaps you should try some spelling variations:
approximation algorithm » approximation algorithms
estimation algorithms » estimation algorithm, optimization algorithms, optimisation algorithm
near approximation » one approximation, network approximation, _ approximation
modified near » modified seird, modified adam
modified pose » modified male, modified passive

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• Performing a fuzzy search may retrieve terms with similar spellings: (( modified near approximation algorithm ) or ( modified pose estimation algorithms ))~.
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