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 notion approximation algorithms" » "modified network approximation algorithms", "modified time approximation algorithms", "modified one approximation algorithms"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified cliff prediction algorithm\") OR (\"modified notion approximation algorithms\"))~".
• Removing quotes may allow a broader search: (( modified cliff prediction algorithm ) OR ( modified notion approximation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified cliff prediction algorithm") OR ("modified notion approximation algorithms"))*.