Perhaps you should try some spelling variations:
"modified multiobjective estimation algorithm" » "modified multiobjective optimization algorithm"
"modified cliff prediction algorithm" » "modified cliff predation algorithm", "modified cliff predators algorithm", "modified risk prediction algorithm", "modified churn prediction algorithm", "modified fire prediction 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 cliff prediction algorithm") OR ("modified multiobjective estimation algorithm"))~.
• Removing quotes may allow a broader search: (( modified cliff prediction algorithm ) or ( modified multiobjective estimation algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified cliff prediction algorithm") or ("modified multiobjective estimation algorithm"))*.