Perhaps you should try some spelling variations:
optimization algorithm » optimization algorithms, optimisation algorithm, estimation algorithm
estimation algorithms » estimation algorithm, optimization algorithms, optimisation algorithm
learning estimation » learning emotion, lighting estimation
how learning » shot learning, when learning, _ learning

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: (( how learning estimation algorithms ) OR ( modified bayesian optimization algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (( how learning estimation algorithms ) or ( modified bayesian optimization algorithm ))*.