Perhaps you should try some spelling variations:
"modified notion estimation algorithms" » "modified notion estimation algorithm", "modified notion optimization algorithms", "modified notion optimisation algorithm", "modified motion estimation 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: (("modified notion estimation algorithms") or ("machine learning solution algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified notion estimation algorithms") OR ("machine learning solution algorithm")).
• Removing quotes may allow a broader search: (( modified notion estimation algorithms ) or ( machine learning solution algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("modified notion estimation algorithms") or ("machine learning solution algorithm"))*.