Perhaps you should try some spelling variations:
"modified objective estimation algorithms" » "modified objective estimation algorithm", "modified objective optimization algorithms", "modified objective optimisation algorithm", "modified objective allocation algorithms"
"machinery using method algorithm" » "machinery using mom algorithm", "machines using method algorithm", "machinery nursing methods algorithm", "machinery focusing method algorithm", "machinery using metal 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 objective estimation algorithms\") OR (\"machinery using method algorithm\"))~".
• Removing quotes may allow a broader search: (( modified objective estimation algorithms ) OR ( machinery using method algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified objective estimation algorithms") OR ("machinery using method algorithm"))*.