Perhaps you should try some spelling variations:
optimization algorithms » optimisation algorithm, estimation algorithms, estimation algorithm
passive optimization » bayesian optimization, game optimization, policy optimization
one approximation » time approximation, _ approximation, rough approximations
modified passive » modified adaptive
modified one » modified male, modified near, modified orca

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 one approximation algorithms ) OR ( modified passive optimization algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (( modified one approximation algorithms ) or ( modified passive optimization algorithms ))*.