Perhaps you should try some spelling variations:
"modified objective optimisation algorithm" » "modified objective optimization algorithms", "modified objective estimation algorithm", "modified objective optimization algorithm", "modified multiobjective optimization algorithm"
"modified risk estimation algorithms" » "modified risk estimation algorithm", "modified risk optimization algorithms", "modified risk approximation algorithms", "modified pose estimation algorithms", "modified bi1 estimation 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 risk estimation algorithms\") OR (\"modified objective optimisation algorithm\"))~".
• Removing quotes may allow a broader search: (( modified risk estimation algorithms ) OR ( modified objective optimisation algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified risk estimation algorithms") OR ("modified objective optimisation algorithm"))*.