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"
"machines using source algorithm" » "machines using our algorithm", "machines using search algorithm", "machinery using source algorithm", "machines using force algorithm", "machines using morse 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: (("machines using source algorithm") OR ("modified one approximation algorithms"))~.
• Removing quotes may allow a broader search: (( machines using source algorithm ) or ( modified one approximation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("machines using source algorithm") or ("modified one approximation algorithms"))*.