Perhaps you should try some spelling variations:
"modified notion approximation algorithms" » "modified network approximation algorithms", "modified time approximation algorithms", "modified one approximation algorithms"
"modified discursive solution algorithm" » "modified discursive evolution algorithm", "modified discursive convolution algorithms", "modified discursive evolutionary algorithm", "modified dispersive solution algorithm"

Try widening your search to All Fields.

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

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