Perhaps you should try some spelling variations:
parameters optimization » parameter optimization, parameter estimation
approximation algorithm » approximation algorithms
optimization algorithm » optimization algorithms, optimisation algorithm, estimation algorithm
one approximation » time approximation, _ approximation, rough approximations

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "(( parameters optimization algorithm ) OR ( one approximation algorithm ))~".
• Adding a wildcard symbol may retrieve word variants: (( parameters optimization algorithm ) OR ( one approximation algorithm ))*.