Perhaps you should try some spelling variations:
"parameters optimisation algorithm" » "parameter optimization algorithm", "parameter estimation algorithm", "parameters optimization algorithms", "parameters estimation algorithm", "parameters estimation algorithms"
"notion optimisation algorithmssssssssssssssssss" » "notion optimization algorithmsssssssssssssssssss", "notion estimation algorithmssssssssssssssssss", "notion estimation algorithmsssssssssssssssssss", "network optimization algorithmssssssssssssssssss"

Try widening your search to All Fields.

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