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

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