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

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

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