Perhaps you should try some spelling variations:
"modified affects estimation algorithms" » "modified affects estimation algorithm", "modified affects optimization algorithms", "modified affects optimisation algorithm", "modified affects digitization algorithms"
"modified notion approximation algorithms" » "modified network approximation algorithms", "modified time approximation algorithms", "modified one 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: (("modified affects estimation algorithms") or ("modified notion approximation algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified affects estimation algorithms") OR ("modified notion approximation algorithms"))*.
• Removing quotes may allow a broader search: (( modified affects estimation algorithms ) or ( modified notion approximation algorithms ))*.