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

Try widening your search to All Fields.

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