Perhaps you should try some spelling variations:
"defined network optimization algorithms" » "defined network optimisation algorithm", "defined network estimation algorithms", "defined network estimation algorithm", "defined network optimisation algorithms", "defined network estimation algorithmss"
"modified network optimization algorithm" » "modified network optimisation algorithm", "modified network estimation algorithm", "modified network estimation algorithms", "certified network optimization algorithm", "modified near 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 network optimization algorithm") OR ("defined network optimization algorithms"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified network optimization algorithm\") OR (\"defined network optimization algorithms\"))".
• Removing quotes may allow a broader search: (( modified network optimization algorithm ) OR ( defined network optimization algorithms )).
• Adding a wildcard symbol may retrieve word variants: (("modified network optimization algorithm") OR ("defined network optimization algorithms"))*.