Perhaps you should try some spelling variations:
"modified one approximation algorithms" » "modified time approximation algorithms", "modified _ approximation algorithms", "modified rough approximations algorithms", "modified male approximation algorithms", "modified near approximation algorithms", "modified orca approximation algorithms"
"code learning method algorithm" » "code learning mom algorithm", "code learning methods algorithm", "code graining methods algorithm", "code learning emotion algorithm", "how learning method 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 one approximation algorithms") OR ("code learning method algorithm"))~.
• Removing quotes may allow a broader search: (( modified one approximation algorithms ) or ( code learning method algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified one approximation algorithms") or ("code learning method algorithm"))*.