Perhaps you should try some spelling variations:
"modified _fverage approximation algorithms" » "modified average approximation algorithms"
"modified deep convolution algorithms" » "modified deep evolution algorithm", "modified deep solution algorithm", "modified deep convolutional algorithms", "modified delphi convolution algorithms", "modified df convolution algorithms", "modified near convolution 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 _fverage approximation algorithms") OR ("modified deep convolution algorithms"))~.
• Removing quotes may allow a broader search: (( modified _fverage approximation algorithms ) or ( modified deep convolution algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified _fverage approximation algorithms") or ("modified deep convolution algorithms"))*.