Perhaps you should try some spelling variations:
"modified notion approximation algorithms" » "modified network approximation algorithms", "modified time approximation algorithms", "modified one approximation algorithms"
"coarse learning emotion algorithm" » "coarse learning evolution algorithm", "coarse learning estimation algorithm", "coarse learning predation algorithm", "coarse learning method algorithm", "coarse graining emotion 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: "((\"coarse learning emotion algorithm\") OR (\"modified notion approximation algorithms\"))~".
• Removing quotes may allow a broader search: (( coarse learning emotion algorithm ) OR ( modified notion approximation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("coarse learning emotion algorithm") OR ("modified notion approximation algorithms"))*.