Perhaps you should try some spelling variations:
"modified notion approximation algorithms" » "modified network approximation algorithms", "modified time approximation algorithms", "modified one approximation algorithms"
"modified model solutions algorithms" » "modified model solution algorithm", "modified model evolution algorithm", "modified model convolution algorithms", "modified nodal solution algorithms", "modified global solutions algorithms", "modified male solutions algorithms"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("modified notion approximation algorithms") OR ("modified model solutions algorithms"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified notion approximation algorithms\") OR (\"modified model solutions algorithms\"))*".
• Removing quotes may allow a broader search: (( modified notion approximation algorithms ) OR ( modified model solutions algorithms ))*.