Perhaps you should try some spelling variations:
estimation algorithmss » estimation algorithm, optimization algorithms
optimisation algorithm » optimization algorithms, estimation algorithm
estimation algorithms » estimation algorithm, optimization algorithms, approximation algorithms
sphere 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: (( sphere estimation algorithmss ) or ( _ ((optimisation algorithm) OR (estimation algorithms)) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( sphere estimation algorithmss ) OR ( _ ((optimisation algorithm) OR (estimation algorithms)) ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( sphere estimation algorithmss ) or ( _ ((optimisation algorithm) OR (estimation algorithms)) ))*".