Perhaps you should try some spelling variations:
"modified network approximation algorithms" » "certified network approximation algorithms", "defined network approximation algorithms", "modified near approximation algorithms"
"powder using methods algorithm" » "powder nursing methods algorithm", "powder making methods algorithm", "powder counting methods algorithm", "code using methods algorithm", "boiler using methods algorithm", "model using methods algorithm"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("modified network approximation algorithms") or ("powder using methods algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified network approximation algorithms") OR ("powder using methods algorithm")).
• Removing quotes may allow a broader search: (( modified network approximation algorithms ) or ( powder using methods algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("modified network approximation algorithms") or ("powder using methods algorithm"))*.