Perhaps you should try some spelling variations:
parameters estimation » parameter estimation, parameter estimates, parameter optimization
estimation algorithms » estimation algorithm, optimization algorithms, optimisation algorithm
force algorithm » source algorithm, search algorithm
based testing » based test, care testing
testing force » cutting force, using force

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: (( based testing force algorithm ) OR ( modified parameters estimation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (( based testing force algorithm ) or ( modified parameters estimation algorithms ))*.