Perhaps you should try some spelling variations:
estimation algorithmss » estimation algorithms, estimation algorithm, optimization algorithms
solution algorithm » evolution algorithm, convolution algorithms, evolutionary algorithm
modified quantile » modified adaptive
modified passive » modified adaptive
passive solution » positive solutions, saline solution

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 solution algorithm ) OR ( modified quantile estimation algorithmss ))~.
• Adding a wildcard symbol may retrieve word variants: (( modified passive solution algorithm ) or ( modified quantile estimation algorithmss ))*.