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