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

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

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