Perhaps you should try some spelling variations:
"modified adaptive ventilation algorithms" » "modified adaptive estimation algorithms", "modified adaptive estimation algorithm", "modified adaptive convolution algorithms", "modified adaptive quantization algorithms", "modified invasive ventilation algorithms", "modified passive ventilation algorithms"
"modified coverage approximation algorithms" » "modified average 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 ventilation algorithms\") OR (\"modified coverage approximation algorithms\"))~".
• Removing quotes may allow a broader search: (( modified adaptive ventilation algorithms ) OR ( modified coverage approximation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified adaptive ventilation algorithms") OR ("modified coverage approximation algorithms"))*.