Perhaps you should try some spelling variations:
"modified objective optimizer algorithmssssss" » "modified objective optimizer algorithms", "modified objective optimized algorithms", "modified objective optimal algorithmssssss", "modified objective optimization algorithmssssss"
"modified parameter estimation algorithm" » "modified parameter estimates algorithm", "modified parameter optimization algorithm"

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