Perhaps you should try some spelling variations:
parameters optimization » parameter optimization, parameter estimation
optimisation algorithm » optimization algorithms, estimation algorithm, estimation algorithms
optimization algorithm » optimization algorithms, estimation algorithm, estimation algorithms
poses optimisation » qoe optimization
core » more, care

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