Perhaps you should try some spelling variations:
"modified multiobjective optimization algorithms" » "modified multiobjective optimisation algorithm", "modified multiobjective estimation algorithms", "modified multiobjective estimation algorithm"
"modified df predictive algorithm" » "modified df predation algorithm", "modified df predators algorithm", "modified _ predictive algorithm", "modified a predictive algorithm", "modified model predictive algorithm", "modified adam predictive algorithm", "modified bi1 predictive 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 optimization algorithms") OR ("modified df predictive algorithm"))~.
• Removing quotes may allow a broader search: (( modified multiobjective optimization algorithms ) or ( modified df predictive algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified multiobjective optimization algorithms") or ("modified df predictive algorithm"))*.