Perhaps you should try some spelling variations:
estimation algorithms » estimation algorithm, optimization algorithms, optimisation algorithm
simulation algorithm » estimation algorithm, solution algorithm, optimisation algorithm
policy simulation » device simulation, plant simulation
post estimation » pose estimation, risk estimation, pulses estimation

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: (( post estimation algorithms ) OR ( policy simulation algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (( post estimation algorithms ) or ( policy simulation algorithm ))*.