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