Perhaps you should try some spelling variations:
optimization algorithm » optimization algorithms, optimisation algorithm, estimation algorithm
qoe optimization » game optimization, _ optimization, stage optimization
based control » case control, based content
modified qoe » modified male, modified _, modified bi1
code based » model based, coal based, income based

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: (( code based control algorithm ) OR ( modified qoe optimization algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (( code based control algorithm ) or ( modified qoe optimization algorithm ))*.