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

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) OR (qoe optimization)) algorithm ) or ( game optimization algorithm ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( ((some optimisation) OR (qoe optimization)) algorithm ) OR ( game optimization algorithm ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ((some optimisation) OR (qoe optimization)) algorithm ) or ( game optimization algorithm ))*".