Perhaps you should try some spelling variations:
"modified notion approximation algorithms" » "modified network approximation algorithms", "modified time approximation algorithms", "modified one approximation algorithms"
"modified large evolution algorithm" » "modified large solution algorithm", "modified large evolutionary algorithm", "modified large convolution algorithms", "modified large evaluation algorithm", "modified early evolution algorithm", "modified oxygen evolution algorithm", "modified male evolution 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: "((\"modified notion approximation algorithms\") OR (\"modified large evolution algorithm\"))~".
• Removing quotes may allow a broader search: (( modified notion approximation algorithms ) OR ( modified large evolution algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified notion approximation algorithms") OR ("modified large evolution algorithm"))*.