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 optimized algorithm" » "modified based optimized algorithms", "modified based optimizer algorithms", "modified male optimized algorithm"

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