Perhaps you should try some spelling variations:
optimisation algorithm » optimization algorithms, estimation algorithm, estimation algorithms
market optimization » parameter optimization, market capitalization
some optimisation » qoe optimization, stage optimization, _ optimisation
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: (( some optimisation algorithm ) or ( ((game optimization) OR (market optimization)) algorithms ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( some optimisation algorithm ) OR ( ((game optimization) OR (market optimization)) algorithms ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( some optimisation algorithm ) or ( ((game optimization) OR (market optimization)) algorithms ))*".