Perhaps you should try some spelling variations:
optimization algorithms » optimisation algorithm, estimation algorithms, estimation algorithm
market optimization » parameter optimization, market capitalization
game optimization » stage 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: (( qoe optimization algorithms ) or ( ((game optimization) or (market optimization)) algorithm ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( qoe optimization algorithms ) OR ( ((game optimization) OR (market optimization)) algorithm )).
• Adding a wildcard symbol may retrieve word variants: (( qoe optimization algorithms ) or ( ((game optimization) or (market optimization)) algorithm ))*.