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