Perhaps you should try some spelling variations:
parameters optimisation » parameter optimization, parameter estimation
estimation algorithmss » estimation algorithms, estimation algorithm, optimization algorithms
optimisation algorithm » optimization algorithms, estimation algorithm, estimation algorithms
df estimation » _ estimation
modified df » modified _, modified adam, modified bi1

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 df estimation algorithmss ) OR ( modified parameters optimisation algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (( modified df estimation algorithmss ) or ( modified parameters optimisation algorithm ))*.