Perhaps you should try some spelling variations:
"modified time approximation algorithms" » "modified one approximation algorithms", "modified _ approximation algorithms", "modified bi1 approximation algorithms", "modified male approximation algorithms"
"modified neural model algorithm" » "modified near model algorithm", "modified thermal model algorithm", "modified neural mom algorithm", "modified neuron model algorithm", "modified nerf model algorithm", "modified normal model 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 neural model algorithm") or ("modified time approximation algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified neural model algorithm") OR ("modified time approximation algorithms")).
• Removing quotes may allow a broader search: (( modified neural model algorithm ) or ( modified time approximation algorithms )).
• Adding a wildcard symbol may retrieve word variants: (("modified neural model algorithm") or ("modified time approximation algorithms"))*.