Perhaps you should try some spelling variations:
"modified positive convolution algorithms" » "modified positive evolution algorithm", "modified positive solution algorithm", "modified positive solutions algorithms", "modified passive convolution algorithms", "modified adaptive convolution algorithms"
"modified time approximation algorithms" » "modified one approximation algorithms", "modified _ approximation algorithms", "modified bi1 approximation algorithms", "modified male approximation algorithms"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("modified positive convolution algorithms") OR ("modified time approximation algorithms"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified positive convolution algorithms\") OR (\"modified time approximation algorithms\"))".
• Removing quotes may allow a broader search: (( modified positive convolution algorithms ) OR ( modified time approximation algorithms )).
• Adding a wildcard symbol may retrieve word variants: (("modified positive convolution algorithms") OR ("modified time approximation algorithms"))*.