Perhaps you should try some spelling variations:
"modified trained convolutional algorithm" » "modified trained convolution algorithms", "modified trained evolution algorithm", "modified trained evolutionary algorithm", "modified graph convolutional algorithm", "modified traces convolutional algorithm"
"modified average approximation algorithms" » "modified coverage approximation algorithms"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified average approximation algorithms") OR ("modified trained convolutional algorithm"))~.
• Removing quotes may allow a broader search: (( modified average approximation algorithms ) or ( modified trained convolutional algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified average approximation algorithms") or ("modified trained convolutional algorithm"))*.