Perhaps you should try some spelling variations:
"modified network approximation algorithm" » "modified network approximation algorithms", "certified network approximation algorithm", "defined network approximation algorithm", "modified near approximation algorithm"
"modified caging predation algorithm" » "modified caging predators algorithm", "modified caging estimation algorithm", "modified aging predation algorithm", "modified changing predation algorithm", "modified charging predation 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 caging predation algorithm") OR ("modified network approximation algorithm"))~.
• Removing quotes may allow a broader search: (( modified caging predation algorithm ) or ( modified network approximation algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified caging predation algorithm") or ("modified network approximation algorithm"))*.