Perhaps you should try some spelling variations:
"modified parameter estimation algorithmsss" » "modified parameter estimation algorithms", "modified parameter estimates algorithmsss", "modified parameter optimization algorithmsss"
"modified objective estimation algorithm" » "modified objective optimization algorithm", "modified objective allocation algorithm"

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 estimation algorithmsss") or ("modified objective estimation algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified parameter estimation algorithmsss") OR ("modified objective estimation algorithm")).
• Removing quotes may allow a broader search: (( modified parameter estimation algorithmsss ) or ( modified objective estimation algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("modified parameter estimation algorithmsss") or ("modified objective estimation algorithm"))*.