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 learning method algorithm" » "mobile learning method algorithm", "modified caging method algorithm", "modified learning mom algorithm", "modified learning methods algorithm", "modified graining methods algorithm", "modified learning emotion 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 learning method algorithm") or ("modified invasive estimation algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified learning method algorithm") OR ("modified invasive estimation algorithms")).
• Removing quotes may allow a broader search: (( modified learning method algorithm ) or ( modified invasive estimation algorithms )).
• Adding a wildcard symbol may retrieve word variants: (("modified learning method algorithm") or ("modified invasive estimation algorithms"))*.