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