Perhaps you should try some spelling variations:
optimization algorithm » optimization algorithms, optimisation algorithm, estimation algorithm
estimation algorithms » estimation algorithm, optimization algorithms, optimisation algorithm
policy optimization » topology optimization
network estimation » network 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: (( modified policy optimization algorithm ) OR ( defined network estimation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (( modified policy optimization algorithm ) or ( defined network estimation algorithms ))*.