Perhaps you should try some spelling variations:
"mobile learning convolution algorithm" » "mobile learning convolution algorithms", "mobile learning evolution algorithm", "mobile learning solution algorithm", "machine learning convolution algorithm"
"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 notion approximation algorithms\") OR (\"mobile learning convolution algorithm\"))~".
• Removing quotes may allow a broader search: (( modified notion approximation algorithms ) OR ( mobile learning convolution algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified notion approximation algorithms") OR ("mobile learning convolution algorithm"))*.