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 learning solution algorithm" » "machines learning evolution algorithm", "machines learning convolution algorithms", "machines learning evolutionary algorithm", "machine learning solution algorithm", "active learning solution algorithm", "mapping learning solution algorithm", "machines learning convolution algorithm", "machines 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: "((\"machines learning solution algorithm\") OR (\"modified objective optimization algorithm\"))~".
• Removing quotes may allow a broader search: (( machines learning solution algorithm ) OR ( modified objective optimization algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("machines learning solution algorithm") OR ("modified objective optimization algorithm"))*.