Perhaps you should try some spelling variations:
"modified notion approximation algorithms" » "modified network approximation algorithms", "modified time approximation algorithms", "modified one approximation algorithms"
"mapping learning solution algorithm" » "mapping learning evolution algorithm", "mapping learning convolution algorithms", "mapping learning evolutionary algorithm", "mapping learning convolution algorithm", "mapping learning emotion algorithm", "machine learning solution algorithm", "enabling learning solution algorithm"

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: "((\"mapping learning solution algorithm\") OR (\"modified notion approximation algorithms\"))~".
• Removing quotes may allow a broader search: (( mapping learning solution algorithm ) OR ( modified notion approximation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("mapping learning solution algorithm") OR ("modified notion approximation algorithms"))*.