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