Perhaps you should try some spelling variations:
"modified a convolution algorithms" » "modified a evolution algorithm", "modified a solution algorithm", "modified d convolutional algorithms", "modified _ convolution algorithms", "modified df convolution algorithms", "modified adam convolution algorithms"
"modified average approximation algorithms" » "modified _verage approximation algorithms", "modified dfverage approximation algorithms", "modified adamverage approximation algorithms", "modified coverage approximation algorithms"

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