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

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("modified notion optimisation algorithms") OR ("modified passive ventilation algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified notion optimisation algorithms\") OR (\"modified passive ventilation algorithm\"))".
• Removing quotes may allow a broader search: (( modified notion optimisation algorithms ) OR ( modified passive ventilation algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("modified notion optimisation algorithms") OR ("modified passive ventilation algorithm"))*.