Perhaps you should try some spelling variations:
"modified up convolution algorithms" » "modified up evolution algorithm", "modified up solution algorithm", "modified _ convolution algorithms", "modified df convolution algorithms", "modified bi1 convolution algorithms"
"modified notion approximation algorithms" » "modified network approximation algorithms", "modified time approximation algorithms", "modified one approximation algorithms"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified up convolution algorithms\") OR (\"modified notion approximation algorithms\"))~".
• Removing quotes may allow a broader search: (( modified up convolution algorithms ) OR ( modified notion approximation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified up convolution algorithms") OR ("modified notion approximation algorithms"))*.