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

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 quantile estimation algorithms") or ("modified invasive optimisation algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified quantile estimation algorithms") OR ("modified invasive optimisation algorithm")).
• Removing quotes may allow a broader search: (( modified quantile estimation algorithms ) or ( modified invasive optimisation algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("modified quantile estimation algorithms") or ("modified invasive optimisation algorithm"))*.