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
sphere estimation » pose estimation
cover » covers, over

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( cover ((optimizer algorithms) OR (optimized algorithms)) ) OR ( sphere estimation algorithms ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( cover ((optimizer algorithms) OR (optimized algorithms)) ) or ( sphere estimation algorithms ))~".
• Adding a wildcard symbol may retrieve word variants: (( cover ((optimizer algorithms) OR (optimized algorithms)) ) or ( sphere estimation algorithms ))*.