Perhaps you should try some spelling variations:
"modified notion approximation algorithms" » "modified network approximation algorithms", "modified time approximation algorithms", "modified one approximation algorithms"
"modified student solution algorithm" » "modified student evolution algorithm", "modified student convolution algorithms", "modified student evolutionary algorithm", "modified student solutions algorithm", "modified student edition 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 student solution algorithm") or ("modified notion approximation algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified student solution algorithm") OR ("modified notion approximation algorithms"))*.
• Removing quotes may allow a broader search: (( modified student solution algorithm ) or ( modified notion approximation algorithms ))*.