Perhaps you should try some spelling variations:
optimization algorithms » optimisation algorithm, estimation algorithm, optimized algorithms
estimation algorithms » estimation algorithm, optimisation algorithm, approximation algorithms
parameter estimation » parameter estimates, parameter optimization
don optimization » qoe optimization, _ optimization, game optimization

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

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