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