Perhaps you should try some spelling variations:
"modified time approximation algorithms" » "modified one approximation algorithms", "modified _ approximation algorithms", "modified bi1 approximation algorithms", "modified male approximation algorithms"
"enabling learning emotion algorithm" » "mapping learning emotion algorithm", "enabling learning evolution algorithm", "enabling learning estimation algorithm", "enabling learning predation algorithm", "enabling learning method 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: "((\"enabling learning emotion algorithm\") OR (\"modified time approximation algorithms\"))~".
• Removing quotes may allow a broader search: (( enabling learning emotion algorithm ) OR ( modified time approximation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("enabling learning emotion algorithm") OR ("modified time approximation algorithms"))*.