Perhaps you should try some spelling variations:
"modified objective optimisation algorithms" » "modified objective optimisation algorithm", "modified objective optimization algorithms", "modified objective estimation algorithm", "modified multiobjective optimization algorithms"
"modified risk estimation algorithms" » "modified risk estimation algorithm", "modified risk optimization algorithms", "modified risk optimisation algorithm", "modified pose estimation algorithms", "modified bi1 estimation algorithms"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("modified risk estimation algorithms") or ("modified objective optimisation algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified risk estimation algorithms") OR ("modified objective optimisation algorithms")).
• Removing quotes may allow a broader search: (( modified risk estimation algorithms ) or ( modified objective optimisation algorithms )).
• Adding a wildcard symbol may retrieve word variants: (("modified risk estimation algorithms") or ("modified objective optimisation algorithms"))*.