Perhaps you should try some spelling variations:
optimization algorithms » optimisation algorithm, estimation algorithms, estimation algorithm
optimizer algorithms » optimized algorithm
optimized algorithms » optimized algorithm
sphere optimization » sphere estimation, stage optimization, response optimization

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

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