Perhaps you should try some spelling variations:
estimation algorithmss » estimation algorithms, estimation algorithm, optimization algorithms
sphere estimation » pose estimation
pose optimization » game optimization, response optimization, policy optimization
qoe optimization » game optimization, _ optimization, stage optimization

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

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