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

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified adaptive quantization algorithms\") OR (\"modified objective approximation algorithm\"))~".
• Removing quotes may allow a broader search: (( modified adaptive quantization algorithms ) OR ( modified objective approximation algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified adaptive quantization algorithms") OR ("modified objective approximation algorithm"))*.