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