Perhaps you should try some spelling variations:
optimisation algorithm » optimization algorithms, estimation algorithm, estimation algorithms
market optimization » parameter optimization, market capitalization
sphere optimisation » sphere estimation
game optimization » stage optimization, qoe optimization, _ optimization

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( ((market optimization) OR (game optimization)) algorithm ) or ( sphere optimisation algorithm ))~.
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• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ((market optimization) OR (game optimization)) algorithm ) or ( sphere optimisation algorithm ))".
• Adding a wildcard symbol may retrieve word variants: (( ((market optimization) OR (game optimization)) algorithm ) or ( sphere optimisation algorithm ))*.