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