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