Perhaps you should try some spelling variations:
"modified changing convolution algorithms" » "modified changing evolution algorithm", "modified changing solution algorithm", "modified learning convolution algorithms", "modified caging convolution algorithms"
"defined network optimization algorithm" » "defined network optimization algorithms", "defined network optimisation algorithm", "defined network estimation algorithm"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("modified changing convolution algorithms") or ("defined network optimization algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified changing convolution algorithms") OR ("defined network optimization algorithm")).
• Removing quotes may allow a broader search: (( modified changing convolution algorithms ) or ( defined network optimization algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("modified changing convolution algorithms") or ("defined network optimization algorithm"))*.