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