Perhaps you should try some spelling variations:
"modified notion approximation algorithms" » "modified network approximation algorithms", "modified time approximation algorithms", "modified one approximation algorithms"
"modified total estimation algorithm" » "modified motion estimation algorithm", "modified pose estimation algorithm", "modified total variation algorithm", "modified thermal estimation algorithm", "modified ti6al4v estimation algorithm"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("modified total estimation algorithm") or ("modified notion approximation algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified total estimation algorithm") OR ("modified notion approximation algorithms"))*.
• Removing quotes may allow a broader search: (( modified total estimation algorithm ) or ( modified notion approximation algorithms ))*.