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

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("modified invasive optimisation algorithm") or ("modified adaptive ventilation algorithmss"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified invasive optimisation algorithm") OR ("modified adaptive ventilation algorithmss")).
• Removing quotes may allow a broader search: (( modified invasive optimisation algorithm ) or ( modified adaptive ventilation algorithmss )).
• Adding a wildcard symbol may retrieve word variants: (("modified invasive optimisation algorithm") or ("modified adaptive ventilation algorithmss"))*.