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

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

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