Perhaps you should try some spelling variations:
optimization algorithmss » optimization algorithms, optimisation algorithm, estimation algorithm
estimation algorithms » estimation algorithm, optimization algorithms, optimisation algorithm
objective estimation » objective optimization, objective allocation
bi1 optimization » _ optimization, qoe optimization, game optimization
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 algorithmss ) OR ( modified objective estimation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (( modified bi1 optimization algorithmss ) or ( modified objective estimation algorithms ))*.