Perhaps you should try some spelling variations:
"modified parameter estimation algorithmssss" » "modified parameter estimation algorithm", "modified parameter estimation algorithmsss", "modified parameter optimization algorithmssss", "modified parameter optimisation algorithmsss", "modified parameter estimates algorithmssss"
"defined network estimation algorithms" » "defined network estimation algorithm", "defined network optimization algorithms", "defined network optimisation algorithm", "designed network estimation algorithms"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("defined network estimation algorithms") OR ("modified parameter estimation algorithmssss"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"defined network estimation algorithms\") OR (\"modified parameter estimation algorithmssss\"))".
• Removing quotes may allow a broader search: (( defined network estimation algorithms ) OR ( modified parameter estimation algorithmssss )).
• Adding a wildcard symbol may retrieve word variants: (("defined network estimation algorithms") OR ("modified parameter estimation algorithmssss"))*.