Perhaps you should try some spelling variations:
"modified network optimization algorithm" » "modified network optimization algorithms", "modified network optimisation algorithm", "modified network estimation algorithm", "certified network optimization algorithm", "defined network optimization algorithm", "modified near optimization algorithm"
"machine learning convolution algorithm" » "machine learning convolution algorithms", "machine learning evolution algorithm", "machine learning solution 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: (("machine learning convolution algorithm") OR ("modified network optimization algorithm"))~.
• Removing quotes may allow a broader search: (( machine learning convolution algorithm ) or ( modified network optimization algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("machine learning convolution algorithm") or ("modified network optimization algorithm"))*.