Perhaps you should try some spelling variations:
"model using source algorithm" » "model using our algorithm", "model using search algorithm", "model using force algorithm", "model using morse algorithm", "code using source algorithm", "models nursing source algorithm", "powder using source algorithm"
"modified network approximation algorithms" » "certified network approximation algorithms", "defined network approximation algorithms", "modified near approximation algorithms"

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: "((\"model using source algorithm\") OR (\"modified network approximation algorithms\"))~".
• Removing quotes may allow a broader search: (( model using source algorithm ) OR ( modified network approximation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("model using source algorithm") OR ("modified network approximation algorithms"))*.