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 network approximation algorithms" » "certified network approximation algorithms", "defined network approximation algorithms", "modified near 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 trained convolutional algorithm") OR ("modified network approximation algorithms"))~.
• Removing quotes may allow a broader search: (( modified trained convolutional algorithm ) or ( modified network approximation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified trained convolutional algorithm") or ("modified network approximation algorithms"))*.