Perhaps you should try some spelling variations:
"modified parameter estimation algorithms" » "modified parameter estimation algorithm", "modified parameter optimization algorithms", "modified parameter optimisation algorithm", "modified parameter estimates algorithms"
"machine learning solution algorithm" » "machine learning evolution algorithm", "machine learning convolution algorithms", "machine learning evolutionary algorithm", "machine learning convolution algorithm", "machine learning emotion algorithm"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("machine learning solution algorithm") OR ("modified parameter estimation algorithms"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"machine learning solution algorithm\") OR (\"modified parameter estimation algorithms\"))".
• Removing quotes may allow a broader search: (( machine learning solution algorithm ) OR ( modified parameter estimation algorithms )).
• Adding a wildcard symbol may retrieve word variants: (("machine learning solution algorithm") OR ("modified parameter estimation algorithms"))*.