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

Try widening your search to All Fields.

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