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

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"designed network estimation algorithms\") OR (\"modified multiobjective estimation algorithm\"))~".
• Removing quotes may allow a broader search: (( designed network estimation algorithms ) OR ( modified multiobjective estimation algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("designed network estimation algorithms") OR ("modified multiobjective estimation algorithm"))*.