Perhaps you should try some spelling variations:
"modified adamverage approximation algorithms" » "modified average approximation algorithms"
"modified gas classification algorithm" » "modified a classification algorithm", "modified class classification algorithm", "modified loss classification algorithm", "modified adam classification algorithm", "modified male classification algorithm", "modified near classification 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 adamverage approximation algorithms") OR ("modified gas classification algorithm"))~.
• Removing quotes may allow a broader search: (( modified adamverage approximation algorithms ) or ( modified gas classification algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified adamverage approximation algorithms") or ("modified gas classification algorithm"))*.