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

Try widening your search to All Fields.

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

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