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