Perhaps you should try some spelling variations:
"modified learning evolutionary algorithm" » "modified learning evolution algorithm", "modified learning solution algorithm", "mobile learning evolutionary algorithm", "modified caging evolutionary algorithm"
"modified notion approximation algorithms" » "modified network approximation algorithms", "modified time approximation algorithms", "modified one approximation algorithms"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("modified notion approximation algorithms") or ("modified learning evolutionary algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified notion approximation algorithms") OR ("modified learning evolutionary algorithm"))*.
• Removing quotes may allow a broader search: (( modified notion approximation algorithms ) or ( modified learning evolutionary algorithm ))*.