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.

• Performing a fuzzy search may retrieve terms with similar spellings: (("model using source algorithm") or ("modified network approximation algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("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"))*.