Perhaps you should try some spelling variations:
"modified df optimization algorithmssss" » "modified df optimization algorithms", "modified df optimisation algorithm", "modified _ optimization algorithmssss", "modified qoe optimization algorithmssss", "modified _ optimisation algorithmssss", "modified adam optimization algorithmssss", "modified bi1 optimization algorithmssss"
"modified objective estimation algorithm" » "modified objective optimization algorithm", "modified objective allocation algorithm"

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

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