Perhaps you should try some spelling variations:
"modified network approximation algorithms" » "certified network approximation algorithms", "defined network approximation algorithms", "modified near approximation algorithms"
"model using open algorithm" » "model using mppt algorithm", "model using our algorithm", "model using driven algorithm", "code using open algorithm", "models nursing open algorithm", "powder using open algorithm", "model using opencl algorithm", "model using one algorithm"

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 open algorithm") OR ("modified network approximation algorithms"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"model using open algorithm\") OR (\"modified network approximation algorithms\"))".
• Removing quotes may allow a broader search: (( model using open algorithm ) OR ( modified network approximation algorithms )).
• Adding a wildcard symbol may retrieve word variants: (("model using open algorithm") OR ("modified network approximation algorithms"))*.