Perhaps you should try some spelling variations:
"modified time approximation algorithm" » "modified time approximation algorithms", "modified one approximation algorithm", "modified _ approximation algorithm", "modified bi1 approximation algorithm", "modified male approximation algorithm"
"modified based solution algorithm" » "modified based evolution algorithm", "modified based convolution algorithms", "modified based evolutionary algorithm", "modified male solution algorithm", "modified based solutions algorithm", "modified water solution algorithm", "modified based evaluation algorithm"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified based solution algorithm") OR ("modified time approximation algorithm"))~.
• Removing quotes may allow a broader search: (( modified based solution algorithm ) or ( modified time approximation algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified based solution algorithm") or ("modified time approximation algorithm"))*.