Perhaps you should try some spelling variations:
"modified df optimisation algorithmssss" » "modified df optimization algorithms", "modified df optimization algorithmsssss", "modified df estimation algorithmssss", "modified df estimation algorithmsssss", "modified _ optimisation algorithmssss", "modified _ optimization algorithmssss", "modified qoe optimization algorithmssss", "modified adam optimisation algorithmssss", "modified bi1 optimisation algorithmssss"
"modified parameters optimisation algorithm" » "modified parameter optimization algorithm", "modified parameter estimation algorithm", "modified parameters optimization algorithms", "modified parameters estimation algorithm", "modified parameters estimation 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 df optimisation algorithmssss") or ("modified parameters optimisation algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified df optimisation algorithmssss") OR ("modified parameters optimisation algorithm")).
• Removing quotes may allow a broader search: (( modified df optimisation algorithmssss ) or ( modified parameters optimisation algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("modified df optimisation algorithmssss") or ("modified parameters optimisation algorithm"))*.