Perhaps you should try some spelling variations:
estimation algorithms » estimation algorithm, optimization algorithms, optimisation algorithm
optimized algorithms » optimizer algorithms, optimization algorithms
optimized algorithm » optimizer algorithms
don estimation » pose estimation, _ estimation, motion estimation

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

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