Perhaps you should try some spelling variations:
optimization algorithmssss » optimization algorithms, optimisation algorithm
estimation algorithms » estimation algorithm, optimization algorithms, optimisation algorithm
parameter estimation » parameter estimates, parameter optimization
game optimization » stage optimization, qoe optimization, market optimization

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( parameter estimation algorithms ) or ( game optimization algorithmssss ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( parameter estimation algorithms ) OR ( game optimization algorithmssss ))*.