Perhaps you should try some spelling variations:
"modified multiobjective optimizer algorithms" » "modified multiobjective optimization algorithms", "modified multiobjective optimized algorithms", "modified multiobjective optimized algorithm"
"machine learning method algorithm" » "machine learning mom algorithm", "machine learning methods algorithm", "machine graining methods algorithm", "machine learning emotion 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 optimizer algorithms\") OR (\"machine learning method algorithm\"))~".
• Removing quotes may allow a broader search: (( modified multiobjective optimizer algorithms ) OR ( machine learning method algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified multiobjective optimizer algorithms") OR ("machine learning method algorithm"))*.