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