Perhaps you should try some spelling variations:
"modified multiobjective optimization algorithm" » "modified multiobjective optimization algorithms", "modified multiobjective optimisation algorithm", "modified multiobjective estimation algorithm"
"modified effect estimation algorithmss" » "modified effect estimation algorithms", "modified effect estimation algorithm", "modified effect optimization algorithms", "modified effect investigation algorithmss"

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 optimization algorithm") OR ("modified effect estimation algorithmss"))~.
• Removing quotes may allow a broader search: (( modified multiobjective optimization algorithm ) or ( modified effect estimation algorithmss ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified multiobjective optimization algorithm") or ("modified effect estimation algorithmss"))*.