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

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("modified static estimation algorithms") or ("modified multiobjective estimation algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified static estimation algorithms") OR ("modified multiobjective estimation algorithm"))*.
• Removing quotes may allow a broader search: (( modified static estimation algorithms ) or ( modified multiobjective estimation algorithm ))*.