Perhaps you should try some spelling variations:
"modified static estimation algorithms" » "modified static estimation algorithm", "modified static optimization algorithms", "modified static optimisation algorithm"
"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.

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