Perhaps you should try some spelling variations:
"modified coverage approximation algorithms" » "modified average approximation algorithms"
"modified near evolution algorithms" » "modified near evolution algorithm", "modified near convolution algorithms", "modified near solution algorithm", "modified early evolution algorithms", "modified legal revolution algorithms", "modified seird evolution algorithms", "modified adam evolution algorithms"

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 near evolution algorithms") OR ("modified coverage approximation algorithms"))~.
• Removing quotes may allow a broader search: (( modified near evolution algorithms ) or ( modified coverage approximation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified near evolution algorithms") or ("modified coverage approximation algorithms"))*.