Perhaps you should try some spelling variations:
"modified multiobjective estimation algorithms" » "modified multiobjective optimization algorithms", "modified multiobjective estimation algorithm", "modified multiobjective optimisation algorithm"
"modified static optimisation algorithms" » "modified static optimisation algorithm", "modified static optimization algorithms", "modified static estimation algorithm", "modified stage optimization algorithms", "modified stochastic optimization algorithms"

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 multiobjective estimation algorithms") OR ("modified static optimisation algorithms"))~.
• Removing quotes may allow a broader search: (( modified multiobjective estimation algorithms ) or ( modified static optimisation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified multiobjective estimation algorithms") or ("modified static optimisation algorithms"))*.