Perhaps you should try some spelling variations:
"modified df optimisation algorithm" » "modified df optimization algorithms", "modified df estimation algorithm", "modified df estimation algorithms", "modified _ optimisation algorithm", "modified _ optimization algorithm", "modified qoe optimization algorithm", "modified adam optimisation algorithm", "modified bi1 optimisation algorithm"
"modified dfdaptive quantization algorithm" » "modified adaptive quantization algorithm", "modified dfdaptive estimation algorithm", "modified _daptive quantization algorithm", "modified adamdaptive quantization algorithm", "modified bi1daptive quantization 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 algorithm") or ("modified dfdaptive quantization algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified df optimisation algorithm") OR ("modified dfdaptive quantization algorithm")).
• Removing quotes may allow a broader search: (( modified df optimisation algorithm ) or ( modified dfdaptive quantization algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("modified df optimisation algorithm") or ("modified dfdaptive quantization algorithm"))*.