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

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( robust optimisation algorithm ) or ( ((same optimisation) OR (game optimization)) algorithms ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( robust optimisation algorithm ) OR ( ((same optimisation) OR (game optimization)) algorithms ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( robust optimisation algorithm ) or ( ((same optimisation) OR (game optimization)) algorithms ))*".