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 algorithmss" » "modified objective location algorithmss", "modified objective allocation algorithm", "modified objective allocation algorithmic"

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• Performing a fuzzy search may retrieve terms with similar spellings: (("modified objective estimation algorithms") OR ("modified objective allocation algorithmss"))~.
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