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