Perhaps you should try some spelling variations:
"modified multiobjective estimation algorithms" » "modified multiobjective optimization algorithms", "modified multiobjective estimation algorithm", "modified multiobjective optimisation algorithm", "modified multiobjective approximation algorithms"
"verified network optimization algorithms" » "verified network optimisation algorithm", "verified network estimation algorithm", "verified network optimized algorithms", "certified network optimization algorithms", "defined network optimization algorithms"

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

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