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

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("modified objective estimation algorithms") or ("modified parameters estimation algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified objective estimation algorithms") OR ("modified parameters estimation algorithms"))*.
• Removing quotes may allow a broader search: (( modified objective estimation algorithms ) or ( modified parameters estimation algorithms ))*.