Perhaps you should try some spelling variations:
"modified mild evolutionary algorithm" » "modified mild evolution algorithm", "modified mild solution algorithm", "modified male evolutionary algorithm", "modified seird evolutionary algorithm", "modified bi1 evolutionary algorithm"
"modified notion approximation algorithms" » "modified network approximation algorithms", "modified time approximation algorithms", "modified one approximation algorithms"

Try widening your search to All Fields.

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 mild evolutionary algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified notion approximation algorithms") OR ("modified mild evolutionary algorithm")).
• Removing quotes may allow a broader search: (( modified notion approximation algorithms ) or ( modified mild evolutionary algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("modified notion approximation algorithms") or ("modified mild evolutionary algorithm"))*.