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