Perhaps you should try some spelling variations:
"allocation optimization algorithmssssssssss" » "allocation optimisation algorithmsssssssss", "allocation estimation algorithmssssssssss", "allocation estimation algorithmsssssssss", "location optimization algorithmssssssssss"
"parameter optimization algorithms" » "parameter optimisation algorithm", "parameter estimation algorithms", "parameter estimation algorithm", "parameters optimization algorithms"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (("allocation optimization algorithmssssssssss") or ("parameter optimization algorithms"))~.
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