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"
"powder using method algorithm" » "powder using mom algorithm", "code using method algorithm", "boiler using method algorithm", "model using method algorithm", "powder nursing methods algorithm", "powder focusing method algorithm", "powder using metal algorithm"

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

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