Perhaps you should try some spelling variations:
optimization algorithms » optimisation algorithm, estimation algorithms, estimation algorithm
optimization algorithm » optimisation algorithm, estimation algorithm, estimation algorithms
dong optimization » qoe optimization, stage optimization, _ optimization
parameter » parameters

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( dong optimization algorithms ) OR ( parameter optimization algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (( dong optimization algorithms ) or ( parameter optimization algorithm ))*.