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