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

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 algorithmsssssssssss"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("allocation optimization algorithm") OR ("parameter optimization algorithmsssssssssss")).
• Removing quotes may allow a broader search: (( allocation optimization algorithm ) or ( parameter optimization algorithmsssssssssss )).
• Adding a wildcard symbol may retrieve word variants: (("allocation optimization algorithm") or ("parameter optimization algorithmsssssssssss"))*.