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"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("designed network estimation algorithms") or ("modified multiobjective estimation algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("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"))*.