Perhaps you should try some spelling variations:
"modified adaptive optimization algorithms" » "modified adaptive optimisation algorithm", "modified adaptive estimation algorithms", "modified adaptive estimation algorithm", "modified objective optimization algorithms", "modified adaptive quantization algorithms", "modified static optimization algorithms"
"modified passive approximation algorithms" » "modified time approximation algorithms"

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 adaptive optimization algorithms") OR ("modified passive approximation algorithms"))~.
• Removing quotes may allow a broader search: (( modified adaptive optimization algorithms ) or ( modified passive approximation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified adaptive optimization algorithms") or ("modified passive approximation algorithms"))*.