Perhaps you should try some spelling variations:
optimization algorithm » optimization algorithms, estimation algorithm, estimation algorithms
optimisation algorithm » optimization algorithms, estimation algorithm, estimation algorithms
bi1 optimization » _ optimization, qoe optimization, game optimization
modified passive » modified adaptive
modified bi1 » modified _

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: (( modified bi1 optimization algorithm ) OR ( modified passive optimisation algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (( modified bi1 optimization algorithm ) or ( modified passive optimisation algorithm ))*.