Perhaps you should try some spelling variations:
"modified quantile approximation algorithms" » "modified time approximation algorithms", "modified diophantine approximation algorithms", "modified adaptive approximation algorithms"
"modified passive convolution algorithms" » "modified passive evolution algorithm", "modified passive solution algorithm", "modified adaptive convolution 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 quantile approximation algorithms") or ("modified passive convolution algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified quantile approximation algorithms") OR ("modified passive convolution algorithms")).
• Removing quotes may allow a broader search: (( modified quantile approximation algorithms ) or ( modified passive convolution algorithms )).
• Adding a wildcard symbol may retrieve word variants: (("modified quantile approximation algorithms") or ("modified passive convolution algorithms"))*.