Perhaps you should try some spelling variations:
optimization algorithms » estimation algorithms, estimation algorithm, optimized algorithms
optimisation algorithm » estimation algorithm, estimation algorithms
static optimisation » static optimization, stage optimization, stochastic optimization
df optimization » _ optimization, qoe optimization, _ optimisation
modified df » modified _, modified adam, modified bi1

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