Perhaps you should try some spelling variations:
"modified multiobjective estimation algorithms" » "modified multiobjective optimization algorithms", "modified multiobjective estimation algorithm", "modified multiobjective optimisation algorithm"
"machinery using methods algorithm" » "machines using methods algorithm", "machinery nursing methods algorithm", "machinery making methods algorithm", "machinery counting methods algorithm"

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: "((\"modified multiobjective estimation algorithms\") OR (\"machinery using methods algorithm\"))~".
• Removing quotes may allow a broader search: (( modified multiobjective estimation algorithms ) OR ( machinery using methods algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified multiobjective estimation algorithms") OR ("machinery using methods algorithm"))*.