Perhaps you should try some spelling variations:
"modified objective optimization algorithms" » "modified objective optimisation algorithm", "modified objective estimation algorithms", "modified objective estimation algorithm", "modified multiobjective optimization algorithms"
"machine learning convolution algorithms" » "machine learning evolution algorithm", "machine learning solution algorithm"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("machine learning convolution algorithms") OR ("modified objective optimization algorithms"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"machine learning convolution algorithms\") OR (\"modified objective optimization algorithms\"))".
• Removing quotes may allow a broader search: (( machine learning convolution algorithms ) OR ( modified objective optimization algorithms )).
• Adding a wildcard symbol may retrieve word variants: (("machine learning convolution algorithms") OR ("modified objective optimization algorithms"))*.