Perhaps you should try some spelling variations:
"modified objective optimization algorithms" » "modified objective optimisation algorithm", "modified objective estimation algorithms", "modified objective optimized algorithms", "modified multiobjective optimization algorithms"
"modified orcad estimation algorithm" » "modified risk estimation algorithm", "modified orca estimation algorithm"

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