Perhaps you should try some spelling variations:
optimization algorithms » optimisation algorithm, estimation algorithm, optimized algorithms
estimation algorithms » estimation algorithm, optimisation algorithm, approximation algorithms
static estimation » static optimization
modified invasive » modified passive

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