Perhaps you should try some spelling variations:
"modified cliff prediction algorithm" » "modified cliff predation algorithm", "modified cliff predators algorithm", "modified risk prediction algorithm", "modified churn prediction algorithm", "modified fire prediction algorithm"
"modified objective optimized algorithm" » "modified objective optimal algorithm", "modified objective optimization algorithm", "modified objective optimized algorithms", "modified objective optimizer algorithms"

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified objective optimized algorithm\") OR (\"modified cliff prediction algorithm\"))~".
• Removing quotes may allow a broader search: (( modified objective optimized algorithm ) OR ( modified cliff prediction algorithm ))~.
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