Perhaps you should try some spelling variations:
optimization algorithm » optimization algorithms, optimisation algorithm, estimation algorithm
estimation algorithms » estimation algorithm, optimization algorithms, optimisation algorithm
based estimation » pose estimation, based investigation, pulses estimation
modified based » modified male

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

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