Perhaps you should try some spelling variations:
"modified multiobjective estimation algorithms" » "modified multiobjective optimization algorithms", "modified multiobjective estimation algorithm", "modified multiobjective optimisation algorithm"
"modified based optimisation algorithms" » "modified based optimisation algorithm", "modified based optimization algorithms", "modified based estimation algorithm", "modified game optimization algorithms", "modified male optimisation 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 based optimisation algorithms") OR ("modified multiobjective estimation algorithms"))~.
• Removing quotes may allow a broader search: (( modified based optimisation algorithms ) or ( modified multiobjective estimation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified based optimisation algorithms") or ("modified multiobjective estimation algorithms"))*.