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