Perhaps you should try some spelling variations:
"modified objective approximation algorithm" » "modified objective approximation algorithms"
"modified adam estimation algorithmss" » "modified adam estimation algorithms", "modified adam estimation algorithm", "modified adam optimization algorithms", "modified df estimation algorithmss", "modified near estimation algorithmss"

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 adam estimation algorithmss") OR ("modified objective approximation algorithm"))~.
• Removing quotes may allow a broader search: (( modified adam estimation algorithmss ) or ( modified objective approximation algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified adam estimation algorithmss") or ("modified objective approximation algorithm"))*.