Perhaps you should try some spelling variations:
estimation algorithms » estimation algorithm, optimization algorithms, optimisation algorithm
cover optimization » game optimization
qoe optimization » game optimization, _ optimization, stage optimization
cover estimation » cover estimations, pose estimation, sphere estimation

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

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