Perhaps you should try some spelling variations:
"modified adam approximation algorithms" » "modified _ approximation algorithms", "modified one approximation algorithms", "modified time approximation algorithms", "modified df approximation algorithms", "modified near approximation algorithms"
"machines using method algorithm" » "machines using mom algorithm", "machinery using method algorithm", "machines nursing methods algorithm", "machines focusing method algorithm", "machines using metal algorithm"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"machines using method algorithm\") OR (\"modified adam approximation algorithms\"))~".
• Removing quotes may allow a broader search: (( machines using method algorithm ) OR ( modified adam approximation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("machines using method algorithm") OR ("modified adam approximation algorithms"))*.