Perhaps you should try some spelling variations:
"modified effect optimization algorithms" » "modified effect optimisation algorithm", "modified effect estimation algorithms", "modified effect estimation algorithm", "modified effect optimisation algorithms", "modified effect estimation algorithmss", "modified effects optimization algorithms"
"modified multiobjective optimization algorithm" » "modified multiobjective optimisation algorithm", "modified multiobjective estimation algorithm", "modified multiobjective estimation 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 multiobjective optimization algorithm") or ("modified effect optimization algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified multiobjective optimization algorithm") OR ("modified effect optimization algorithms")).
• Removing quotes may allow a broader search: (( modified multiobjective optimization algorithm ) or ( modified effect optimization algorithms )).
• Adding a wildcard symbol may retrieve word variants: (("modified multiobjective optimization algorithm") or ("modified effect optimization algorithms"))*.