Perhaps you should try some spelling variations:
"modified notion optimization algorithms" » "modified notion optimisation algorithm", "modified notion estimation algorithms", "modified notion estimation algorithm", "modified network optimization algorithms", "modified policy optimization algorithms", "modified allocation optimization algorithms"
"machine graining methods algorithm" » "machine learning methods algorithm", "machine learning method algorithm", "machine making methods algorithm"

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

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