Perhaps you should try some spelling variations:
"modified objective optimisation algorithmss" » "modified objective optimisation algorithm", "modified objective optimization algorithms", "modified objective estimation algorithms", "modified objective optimization algorithmss", "modified multiobjective optimization algorithmss"
"modified parameter estimates algorithms" » "modified parameter estimation algorithms", "modified parameter estimation algorithm", "modified parameter optimized 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 parameter estimates algorithms") or ("modified objective optimisation algorithmss"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified parameter estimates algorithms") OR ("modified objective optimisation algorithmss")).
• Removing quotes may allow a broader search: (( modified parameter estimates algorithms ) or ( modified objective optimisation algorithmss )).
• Adding a wildcard symbol may retrieve word variants: (("modified parameter estimates algorithms") or ("modified objective optimisation algorithmss"))*.