Perhaps you should try some spelling variations:
"modified learning method algorithm" » "mobile learning method algorithm", "modified caging method algorithm", "modified learning mom algorithm", "modified learning methods algorithm", "modified graining methods algorithm", "modified learning emotion algorithm"
"modified network approximation algorithms" » "certified network approximation algorithms", "defined network approximation algorithms", "modified near approximation 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 network approximation algorithms") OR ("modified learning method algorithm"))~.
• Removing quotes may allow a broader search: (( modified network approximation algorithms ) or ( modified learning method algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified network approximation algorithms") or ("modified learning method algorithm"))*.