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