Perhaps you should try some spelling variations:
estimation algorithms » estimation algorithm, optimization algorithms, optimisation algorithm
optimizer algorithmss » optimized algorithms, optimized algorithm
optimizer algorithms » optimized algorithms, optimized algorithm, optimization algorithms
risk estimation » pose estimation
pulses » pulse, pulsed

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: (( pulses ((optimizer algorithmss) OR (optimizer algorithms)) ) OR ( risk estimation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (( pulses ((optimizer algorithmss) or (optimizer algorithms)) ) or ( risk estimation algorithms ))*.