Perhaps you should try some spelling variations:
optimization algorithmss » optimisation algorithm, estimation algorithms, estimation algorithm
parameters optimization » parameter optimization, parameter estimation
optimization algorithms » optimisation algorithm, estimation algorithms, estimation algorithm
cost optimization » robust optimization, qoe optimization, smooth optimization

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( cost optimization algorithmss ) OR ( parameters optimization algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (( cost optimization algorithmss ) or ( parameters optimization algorithms ))*.