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