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