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

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( modified adaptive optimization algorithms ) or ( modified invasive estimation algorithms ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( modified adaptive optimization algorithms ) OR ( modified invasive estimation algorithms ))*.