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

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