Perhaps you should try some spelling variations:
"modified invasive optimisation algorithm" » "modified invasive optimization algorithms", "modified invasive estimation algorithms", "modified passive optimisation algorithm"
"modified adaptive estimation algorithm" » "modified adaptive ventilation algorithm", "modified quantile estimation algorithm", "modified adaptive quantization algorithm", "modified passive estimation 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 estimation algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified invasive optimisation algorithm") OR ("modified adaptive estimation algorithm")).
• Removing quotes may allow a broader search: (( modified invasive optimisation algorithm ) or ( modified adaptive estimation algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("modified invasive optimisation algorithm") or ("modified adaptive estimation algorithm"))*.